4 or 5?

[PDenbigh]

OK, here's the deal. I have, and hate, my 4x108 bolt pattern, so I am getting rid of it. Here are my options:

5-lug conversion, to 5x114.3 (same as Mustang). The kit I can get, however, has 12mm studs, and from what I can tell, Mustangs use 1/2" studs. Not a huge difference, but I have heard that if I use rotors designed for 1/2 on 12mm, when braking hard, they shift around, and result in vibration or worse. Any knowledge on this? The 5-lug is more work, but I feel would be a little more hard core, but that's only because I associate it with a Mustang.

4x100 conversion, so I could be like a normal 4-lug car, which for once would be great. Questions: Can 4-lug take a lot of Torque and stress? (RWD Car). Also, does anyone in Harrisonburg have a rotor (used) from a Civic, etc, so I can see if it will fit around my hub? (Hub-centric car) This would be the easiest option, as I could just have my current hubs drilled. Would you guys reccomend going to something like this so that I could use (civic, etc) rotors, and have a much larger selection of wheels? Who makes huge, slotted, hard core rotors like this? The car weighs around, hmm, 2700+ish, and will be my track car.

Any thoughts?

Thanks a bunch.