I have the same 4 ton jack as TheUser does and its worked fine for the 2 years ive had it. it may be over kill for you but you never know when you might need it.
Not to be rude but there is alot of information on this site. Just use the advanced search button for whatever your looking for. If you have any more questions everyone here would be glad to help.
Just go with the performers. You will be kicking yourself later down the road when you want more power if you get the thumpers. Im running trick flows and love them.
I wouldnt do this unless you have the diff in a jig or else you could have some problems with warping. If your tubes are already out of alignment it will make it worse.