LnS - Turbs are often a bit limited with regards to pilot weight. 100 mph from a Luton Minor is fantasy.
Luton/FRED/VP1 = about 60kts
Turbulent = a bit faster
Jodel D9/Taylor Mono = faster still
Colibri = warp factor 9
No single seat Vee Dub powered aircraft is a good fit for a big pilot. The Motorised T31 is probably the worst performer of the lot but by my reckoning that would probably make it the most fun! The cheapest to buy would definitely be the T31 or the FRED. Both have the added advantage of being able to be derigged for cheap hangarage but this is probably easier with the FRED. All this talk is really making me miss this kind of flying. I move back to the UK at the end of the year. I could be tempted to become a syndicate partner!
Regards
wizzy