I'm with him ^.
I've been thinking about this for a while and this thread finally got me off my butt to do a little measuring/figuring in the garage. Have been pondering 4 post vs 2 too as I both want more toy room and DIY all my automotive work.
Main benefit of the 4 post seems to be more room for another toy in the garage. My NSX conservatively measures 46" tall and its potential bunkmate measures a conservative 51" tall. My garage ceiling is 107-110" tall (sloped for drainage of the roof above it). Where the roof of the car is is about 108. So, I am guessing this is a no-go unless you guys have come up with something lower profile in the last 7 years.
So, I can live with a 2 post for easier maintenance and one less toy in the garage. In particular the XPR-9-LP looks like the ticket, but I am 5" short of the 113" specified and I have a post tension slab.
What I really wish was available is a wide/long 4 post where the ramps could be removed and arms a la 2 post could be put in place for when brake work/wheel rotations were to be done. I think I have enough width and depth to accommodate such a contraption.
Any thoughts, or is it better to have this conversation a few years from now after I (hopefully) get around to building that dedicated shop I really want?