Yamaha DTXpress/DTXplorer/DTXtreme

OK , I know I'm getting a bit ahead of myself here. I'll probably 
spend a week or two drumming on the basic set without pressing any 
buttons apart from the on/off switch. However, I'd like to know which 
of these two products the group suggests using. Like, does almost 
everyone have Cakewalk so there's loads of advice for it. I have VST 
at the moment and have played around in it. I've never tried 
Cakewalk. I've never managed to get MIDI working in VST (Not tried 
very hard mind). Is it worth changing?

Cheers ma dears
Cammy