Yeh mate im GTI, going for stage 2 remap today.
As far as i know stage 2 is with standard fuel pump, stage 2+ is with high pressure pump.
You do get free upgrades between map stages with APR- pretty good id say!!
As for intercooler, Ed30s can make 350bhp without upgrading..
I think if you go stage 2+, so with a HPFP and 3" downpipe- you will see around 340bhp. Its mental what power they can achieve and so easily!
Your clutch will cope, for a while, but make that the next thing to save for id say!
Im speaking from my mates experience with his ED30, who is on here and running stage 2+ and the thing is an absolute weapon!