first.... welcome 2 CHR

And on your question do a search on this site for "subframe"
you'll get alot of info.
My opinion.......the only thing about getting one that's already switched, Is who did the work, what did they use? is it done "right" or "is it going to go down the road with a dog leg to one side or the other?" if your new to the whole thing do your home work on what you want first and then no one can "rip you off" getting rid of they're mistake and you'll have an idea if its done right.

"maybe someone here can give you all the details of each set-up?"

but if you do that search and read a little maybe "you'll have it narrowed down?" where someone can really help you?

"Glade you joined!"hope this helps .........