Like I've said so many times before the drive tran in the cen is trash. Lots of drag (we haven't even figured out why yet even after going over every part of the drive tran) and it wears out in no time. Unless you want to upgrade the drive tran after a month of weekend only running then the matrix is a great handling and a tough buggy. The jammins a good buggy but like with all ofnas you need to upgrade the electronics if you get their RTRs.

If you want a kit get the hyper 7 TQ kit on tower for $200. Then buy a starterbox, engine, electronics, diff and shock oil.
If you want an RTR get the mayhem... best electronics and engine out of any RTR on the market that you never need to upgrade either untill they wear out.
You'll be spending about $500-600 if you get one of these choices but you'll be driving them more then you will be working on them unlike the others.