I think Stage 1 map brings them to 310bhp. The stock clutch isn't great apparently if you buy a manual and there's a good chance of slip with a stage 1 map.
Slip, slip, sliding away!
You "might" manage Stage 1 but (like me) plan on a £1k+ bill for an uprated clutch after that!
Back on topic, its not worth the jump in monies IMO. I went from a GTI to an Eddy and love it but when I bought mine a couple of years ago the difference was a lot less so less of a factor.
If you can wait, get an R when money allows!