I've tried many macro lenses, but only keeping one for now, the A50/2.8. It's tiny, small, 1:2 only, but it gets the job done.
Probably will get a Voigtlander 125/2.5 someday. Tried it before, a very nice lens. A bit too heavy than what I really like, it's a bit hard to mount the lens on due to the big focus ring (virtually the whole barrel IS the focus ring!) ...
Kind interested in the Tokina 90/2.5 macro lens. Heard alot good things about this one, but I'd love to hear some actual users experiences here if you like to share
Cheers!