Depending on what you want to do, you should probably go dive into some heavy reading on rccrawler.com. Right now, I have 4 Axial based crawlers and wouldn't buy anything else for a 2.2 build unless it was a Berg (
http://www.amainhobbies.com/product_...ducts_id/23788). While you're looking around, be sure and check out some of my favorite brands/products:
Wheels:
Mayhem Engineering:
http://www.rccrawler.com/forum/showthread.php?t=103930
Creat A Crawler (CAC):
http://www.rccrawler.com/forum/showt...&highlight=cac
Eritex Inc:
http://www.eritexinc.com
Chassis:
HBZ Warthog:
http://www.hbzusa.com/WARTHOG.htm
Death Metal Garage DCV Pro:
http://www.rccrawler.com/forum/showthread.php?t=83451
Vendors I recommend:
RPP Hobby:
http://www.rpphobby.com
RCP Crawlers:
http://www.rcpcrawlers.com
Also, both amainhobbies.com and stormerhobbies.com have good selections of crawler parts too.
The biggest thing is to read a lot before you dive into your build.