Good ones to look at are the XTM Mammoth ST, pretty cheap, well under $400 but its not the highest quality rig. The next up would be the LSP I think, very great handling true truggy, The Mammoth is not cause it has a two speed, but the whole layout is of a truggy. The LSP is a Hotbodies btw, I owned one and they are great. I would lookin into and decide between those two or a revo. Both the truggies are big block powerd 1/8, and the revo is small block 1/10 but its basically 1/8 sized.
The Revo is going to be the best basher, the trugggies will have an edge in performace stock.
If you go for a buggy, yes the Hyper 7 PCR RTR is a good one, others are the Mayhem or Jammin x1-CR. Yes, theres tons of choices lol, anything listed so far you will not be unhappy, its really a matter of preferce.