I'd say get the Xray at least we know a few team drivers here who can help with setups and they all race near by. Its cheap too.
THe 415 is a fab car but comments from all owners I know all told me the car does wear quickly and you need to keep renewing all the ball joints etc... spares in UK is for the 415 can be potentially a problem.
Thanks Rem..... I had a gutsful of the Pro4 I just can't seem to get the setup on it right .... when I first got it .. car was ballistic but the longer I had it the car has got worse... with a spool at front it should not spin out like it was doin .. anyway a change is like a holiday ... so new car here I come ....!!! Think I'll put in pre-order at speedtech ..!