I've researched them a few times and keep coming back to a Mohawk 12,000 lb two post lift as the first choice and a Rotary 12,000 lb as second choice. Both brands also offer a 15 or 16,000 lb which are mostly the same physical size as the 12,000lb versions. I wouldn't mind either.

http://www.mohawklifts.com/wp/automotive-lifts/2-post-lifts/lmf-12-tp-16/

http://www.rotarylift.com/Lifts/SPO12/

They're both expensive new but on several occasions I've seen them for sale used and appeared in good shape for a fraction of the new cost. If you have time then searching for a used one might pay off. I gave up looking for now until I'm really ready to buy one and install it.

Check the concrete specs recommended for the lift you do decide on because your existing slab may be adequate.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-