If i opted for the SC, the limit is between 240&270bhp, the turbo conversion has no limits really, i would like about 350bhp. I wouldnt have the standard i would have them tune it to phase 4 straight away, as for the CS5 route on mine, im not far off now, 200cell, exhaust manifold, and a remap, and i reckon i might be around 210bhp.
To be honest john, its just me looking around at the mo, its alot of money on top of what i have just spent, i would love to give my car to them, then have it back running 350bhp for under 6500-7k. On the plus side, i should get about £500 for my 2.2 engine, not a huge dent in the costs tho.