hmmm honestly not sure - Ive found DBP & DBC to be my prime source of entertainment over the past 12 years.
Currently Im more than happy with DBP, I just worked out I can have the vegetation I want in Evolveds Advanced Lighting water and LOD terrain demo(didnt know what a draw call was, never heard of it, found out the other day, so I applied some serious batching(HLOD) with DLOD and although tests where simple Im confident I can move on now I know what a draw call is and its limits on my card - 9600GT, it can handle close LOD models of 25k poly meshes - app 100 trees in frustrum at any time 30 fps tested with additional spot light, 5x col_z and smoke particles... full settings incudling SSAO, except card settings set for performance with vsync on

)
So for the near future Im happy enough on X9, BUT I think you should carry on, DBP needs to progress for when x9 is on its way to becoming a thing of the past, the in-house version of X10 is ok but it lacks a lot of, well - everything, and a makeover would be real nice. Right now I wouldnt buy it unless I had money and nothing to spend it on(though Id get a new gfx card first) but at some point not in the near future I would certainly buy it though it has to be said again - give us some proper documentation this time please - even if the helpfiles where always accurate I honestly dont feel they are enough on there own anyway. Imagine you were me and you go through months of having internet then months of not having it - can take me a long time to find something out just using the helpfiles!! I feel there is a lack of context in terms of learning - what attracted me to DBP was I could
easily build a 3d environment, then I wanted better 3d environments, I knew it would be a lot to learn, problem was that there was always a massive lack of information/direction to learn from; the forums are great but they dont suffice if a)you dont always have the ability to access or b)you dont like to ask for help because youve already been told what your trying to do isnt possible but you thought youd go for it anyway.. well, ok perhaps a) is my only valid point, the other gripe I had about X9 was the shaders, I think no additional purchase of DS should have been required to learn - and no I dont think we should have to decipher sdk helpfiles instead(even with DS I end up doing this), X10 will be a big jump to learn from X9 Im guessing so please please please provide some decent documentation for all shader models at least at a basic level, in laemens with a thorough overview to help keep things in context
Having said all that you have IMO made an excellent product - among many - realistically I think though for me its enough for the time being, Ive spent a lot of time with it in its current state rewriting programs over and over just to progress my knowledge of its capabilities so I dont fancy starting from scratch in a new product if there are too many changes affecting what Ive wrote so far
and I somehow doubt I have the capability of rewriting Evolveds AL shaders in X10/11 lol, I barely have a grasp of the X9 version. Some of us will want to do that work but I suspect most of us wont, I cant speak for anyone else, but all I ever wanted was to be able to build nice large outdoor environments with lights, shadows and water with the option of additional effects EASILY, before I start actually coding a game in that environment. Perhaps that was just me hoping for too much, but now Im much nearer to that goal, so Id only be willing to move on to elite if a full shader system similar to adv lighting by Evolved still worked or a replacement provided. Its something I do in my spare time as a hobby although I do put a lot of time in on it, I simply dont have the kind of time or capability to take care of every aspect of game environment in this way - which is why I bought plugins and use free plugins for as much as possible
Anyway to summise, yes go for it - no I wont purchase any time soon, but yes I most definatley will purchase as some point, if I have spare cash then it will be straight away just cos I like your products otherwise it will be at some point over the next year..price seems fine for whats on offer
EDIT: oops meant 400 trees with close LOD at 22k meshes for 4 trees @ 5-6k each, 100 is the number objects used for draw calls, have actually had 900 trees, with grass and bushes..though my DLOD sucks!
EDIT2: screenies on this page to download
https://forumfiles.thegamecreators.com/download/2379436