first thing is the 5b ss and the 5t use the same "upgraded" parts. same things. if anything the bt has some other cool option like dirt de-flectors and plastic pullstart cover. second, the 5t shell is around 200, its very durable and could withstand alot of abuse, BUT the new proline "rat" body is only $120. the 5t also jumps better then the 5b,(air flows over the shell smoother). and the 5b ss tires dont last long. maybe 2 tanks. the pin spikes wear quickly and tires rip easly. the 5t tires last a good while and are taller too.. go with the 5t if you can. the kit is nice, but you will have to pretty much take apart the rtr anyway to re-thread lock it and do your pre-run check out.. remember, the ss kit doesn't come with reciever pack($48)