HPI have made loads of money from quality RTR cars (such as the firestorm and savage) whereas tamiya never really got seriously into the rtr scene and the cars which they sell as rtr are just not up to the standards (for example) set by hpi, i mean just compare the Tamiya Nitrage 5.2 and the Savage X, Savage is just better... Also another problem about tamiya that they are simply too big: it sells just about anything which has to do with modeling but children today would rather play on a PSP than build a 1/35 scale tank, and as Jimmy said PR in UK is virtually nil which is the same as the whole of EUROPE sadly

(don't get me wrong i despise rtr but damn it they sell to the masses)