1) Drifting is not "racing, per se, and we all mostly just drift around wherever we can. I haven't been into the comp scene for a while, and don't know if there are even comps being run, any longer. All of us drifters do with what we can, but.....

$350 is a low budget threshold. Can't do much with that. All but one of the choices you posted require drift tires, so you will more than likely need to buy more than just an RTR. The HPI Sprint 2 is not a great drift chassis. It WILL drift, but is balanced badly for it. The TT01 also will require option parts, if longevity is a concern. The prop shaft Tamiya includes with all TT01's is plastic.

Lots of guys are going to the Madspeed cars. Those are cheap and last a while, so if you don't think drift is for you, you haven't plunked down much.

Drift is much better and more exciting, if you are into the whole thing - building and detailing. Otherwise, for many, it's just another segment of RC, and the drift devotees don't really respond to them. I'm here, basically because I'm not doing much, and was surfing around.