Everyone that has a floor jack will have their fave...I bought a Larin 5000 lb
several years ago, similar to the one in the link. I think I recall paying $135 for
it. It just slips under my Vette and reaches far enough for the X. 
 
I agree with JCL that a 2 ton is plenty; the full weight of the car is never supported by a floor jack. 
If you need jacking point pics, try Search Tab as there are threads with pics.
 
Don't even think about going under the car while it is up on the trolley floor jack, however.
GL,mD
 
Larin Aluminum Floor Jack 2 Ton Capacity - Auto - The Garage Store