ESP, you can search for engines all day. At DBPs price, you'll find them similar in levels of capability. Usually less.
DP is a great product. It is the best rigid body simulator I've seen. We're using million dollar technology in indie games. People are as likely to get DP to work for them as they are DBP, but unfortunately I see more people complain than produce anything.
@ale870 -
There are so many things that you can do. It depends on the needs of your game. I would say that anything is possible, if you approach the problem correctly.
Honestly, with suspension, I think that an animated body overlaid onto a DP car frame would be the best. This would allow you to simulate suspension based on the physics reactions very realistically, without placing additional demand on the system and not interfering with the operation of the wheels.
As far as crash information, you have every bit of information supplied to you about the car's velocity and direction of travel supplied to you. You have to interpret this information for yourself and create your own car crashes. Check out my Dark Physics Compo entry and you'll see some really nice car crashes in action.
Come see the WIP!