Buy one then, They are all good in there ways, the 1.8 and 2.0 16v are both around a 137bhp as standard, 2.0 has more torque to it, but the 1.8 head is better and does not have a bhp eating cat, 2.0 has all the later corrado changes, (Bonnet, interia etc)
G60 is good fun too and can be easily and cheaply upgraded to 200bhp+ and the VR6 is king of the lot with all the later mods and 190bhp as standard, costs more to tune and can suffer from bore wear and timing chains usually need doing around 100k and are a costly job.
The Corrado handles much better then a mk3, Corrado's are unique and people will reguarly compliment your car.
I love my vr6 Corrado, costly and nigglesum as they can be,