I'd say the Losi either their new drift kit or get a regular XXX-S and drift it. I own both a TC 4 and a Losi XXX-S, if I had to choose one it would be the Losi. The enclosed drive train is really nice, the chasiss is dirt simple for maintainence, yet fully adjustable for setup. The RTR comes with a nice radio and I like the novak based ESC. The TC4 is a fine car, but I perfer the Losi. I've never driven or owned an HPI car so I can't comment on them.