I looked at the ones from costco. They looked good but I wanted something that would last a lifetime that's why I just bought this one from Asedeals
it's the one on the left in the pic. It has an extremely low profile (3.1 inches) and lifts to a max height of 29.2 inches SWEET a bit pricey at right around 400 bucks with shipping but they are fully rebuildable and carry a 5 year warranty. The same/costco jacks are definately a cheaper alternative.
<img src="http://www.asedeals.com/NewJacks4Jpg.jpg" alt=" - " />