My opinion on the Tamiya front is, I think there like a "past master" they just like to dip there toe in every now and then just so they can say "we still got it!"
Its such a large company that they can throw a fortune at it for that 1 car just soley for the result then fade into the background and there norm run of the mill totally covered hobbyist markit that they cover so well!
That to me says Great if you only want a seasons racing then your on your own !
I think your better with the Kyosho's and the likes, the real racers the ones that strive on in the developement stakes to keep there cars at the top !
And yes as Jimmy states the zx5 does call out for a top driver, not only cos its a good car that needs its profile lifted in the UK but also for all the club racers out there that need that little bit of help in the developement stages of the car that having a top driver can do.
Get down off me soap box now