I saw the DRX at a model fair last year, and was impressed by the size and quality..
BUT!!... It doesn't have a 2-speed. So basically, the other two cars will be TWICE as fast. I got the DM-1, and it is fun.. Mine's been pretty high maintenance though, and a much bigger investment than I wanted.
The DRX is so damn cheap over here, I'd just say, if you like it, get it... Needs a 2-speed though IMHO...
The DRX is more a drifter I think. The IGT2 is much more capable, but needs a few mods from what I hear. It's also discontinued I think. The DM-1 is not all that easy to get parts for IMO.. At least compared to my offroaders..
Much better RC than all of the above??.. Associated SC8....
-Team Associated RC8.2, RC8T CE, & SC8 with 1.) Argus A52/0801, 2.) RB Fire 11/2058 or 053, 3.) RB Blast V9/2045, 4.) Nosram RS.30RR/JP-4, & 5.) modded Nosram RS.21RR/086
-LST2 #1 with Losi 454 & LST2 #2 with Dynamite Big Red .28
-Ofna DM-1 with silver Mach 427/2047
-TT MT4 G3