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I've been very happy with my A99. I've been working on tilt/shift photography the last couple years, and this camera is awesome for that. The focus peaking + in body stabilization are very helpful. I use a mirex to M645 t/s adapter with programmable confirmation chips, letting me select 24, 35, 45, 55, 80, 120, 150, and 630mm for image stabilization purposes.
My M645 lenses are: 24/4 fisheye, 35/3.5, 45/2.8, 55/2.8, 80/1.9, 120/4 Macro, 150/2.8, 150/3.5, "500"/5.6 rubinar mirror (measured at 630mm via moon photos), 2x TC, and ext. tube set. Of these, the 80/1.9 and 150/2.8 are usually in my bag plus one of the wider lenses.
I have a few wide, non-tilt lenses: samyang 14/2.8 and samyang 24/1.4. I installed James Lao chips in both. This enables some very low shutter speeds. The 24/1.4 is a great lens. The 14/2.8 isn't all that sharp, but there isn't any other reasonably priced option for going ultra-wide on the rare occasion it's needed (I got mine for $340 via Adorama, branded as "pro-optic".
I also have a Minolta AF 200mm f/2.8 APO G HS and the matched 2x TC. This pairs well with the A99. This is a really nice lens, super sharp, fast A.F. ... however, it is usually redundant (not in the bag) since I prefer the tilt/swing flexibility given by using the mirex + 150/2.8. If I know I'll be doing action shots were fast AF is needed, I'll take the Minolta 200mm, but that usually isn't the case for me.
I have a couple cheap lenses I use when trying to travel light:
24/2.8 Sigma "super wide" - for a 24mm lens this has decent macro capability.
28/2.8 Minolta - a bit sharper than the Sigma 24/2.8.