This is an older thread that's pretty much all talked out but I want to mention that I have a Kwiklift (
www.kwiklift.com). This is a ramp system that you drive the car onto, then jack up the low end. Once the low end is high enough, there is a leg on each ramp that drops down for permanent support. Once lifted and supported, the car is about 20 inches up in the air, which is high enough for me to get under it on a creeper. You will need a floor jack that can lift at least 22 inches or so.
I've had my Kwiklift for about 2.5 years and it has been great. I've replaced exhausts, swapped transmissions, done numerous oil changes, worked on brakes/wheels and done suspension work. The ramps are wide and strong enough to support a jack. I also got the accessory "bridge," which is a very sturdy steel beam that runs between the ramps. I can position it under the front wheels and jack a wheel up from under the car.
Driving the 968 up it is no problem at all -- there is no scraping. My neighbor's 2001 Corvette did scrape the chin spoiler but it's pliable rubber and there was no damage or deformation. (We installed a "skip-shift" eliminator kit in his 'Vette, took pictures and wrote it up for Corvette magazine!) I leave a car parked on the Kwiklift at all times (in ramp mode with wheel chocks), so it does not consume a space in my garage.
Obviously, the Kwiklift does not lift a car high enough to get another car underneath. It also must be installed on concrete and the instructions warn against using it on asphalt. However, it's been great for working on cars and it's certainly made me popular with my neighbors. I've done one mod to it: I got two 10-foot long strips of non-skid material from Home Depot, the kind of stuff you use on stair treads, and ran a strip down the center of each ramp. That eliminated wheel spin while climbing the ramp. (Kwiklift sells these non-skid strips but it was much cheaper at Home Depot.) Two guys can move the Kwiklift in seconds but it would be tough for someone to move it alone. However, minor adjustments are easily done by one person.
Anyway, that's what I use for a lift. It's not the answer for everyone and it may not be the perfect solution, but it works well for me. I paid around $1,400 and I think versions start around $1,100.
--Bob