IMO matey, go for the st220 3.0 lump, 220hp straight out the box, easy to get even more out of with just a decat and remap, bags of torque, the st220 is no slouch and that weighs basically 2tonne..

iv had all 3, st24, st200 and the 220. the 24 and 200 run that crap imrc system that never works properly aswell..the 3.0 is just a different animal.

imagine what it would be like in the lighweight mk4 shell..
its the lightest and strongest and most reliable v6 ford have built.

good luck either way, stick with it