Download the Demo's of DarkBasic Standard w/30 Enhanced and DarkBasic Pro ... then base on the merits of each which you'd prefer.
For the next 3-4months i'd recommend all beginners to DarkBasic Standard ... then move onto Enhanced (DarkMatter) or striaght onto Professional.
The price tags aren't as greatly different as people make out, because on Amazon.co.uk (not checked .com) you can pickup DarkBasic Std for £20, Enhanced upgrade (DarkMatter) for £20 and Pro for £55 plus the menial £5 p&p
So what you purchase is upto you, just try out the languages before you choose to go with one or the other
You never know, your might not like either and prefer BlitzBlasic3D or C++
Anata aru kowagaru no watashi!