roadster vs locost?

[BackyardRacing]

Hi all, first post noob here!

been lurking for a while, and ready to take the plunge, and wanted a little advice from the guys in the know.

im currently stuck with deciding whether to start from scratch with a roadster build, or buy an original locost, (theres a couple on ebay look like good starting points).

i know the roadster has IRS and the locost is live, so im guessing the roadster will handle better, be more agile?

i dont like the "wide body" cars, and im not a big guy, so i want a slim looking car, as close to the original seven design as poss in appearance, but with the best possible handling, so im a little stuck on what to go for, as i believe the locost is slimmer (truer to the original design) than the roadster, and if i pick up an "unfinished car" i can save a fortune.

i was thinking maybe i could reduce the width of the roadster to make it look more like i would prefer, but then no body-panels will fit i believe?

on a second note, i cant weld, so would probably get a pre-welded chassis, i have noticed talon fabrication make these, has anyone from here bought a chassis from talon, any reviews of the quality?
not doubting anyone, just looking for some input, more to put my mind at ease i suppose being such a critical part of the car.

also i believe the locost will end up a tad lighter than the roadster, which must be a + on the performance/handling debate

thanks in advance, Ant