Thats the problem Mike, it is fun!! I am looking for a good macro and have been considering the Tamron 90mm based on a lot of reviews over on Dyxem. I shot a few with Grumpys 50mm 2.8 the other day and they it was pretty cool.
Heck, the glass side of this thing is immense to say the least! I spent hours reading reviews and comparisons on macros and it seems to me like most of the reviews were sour grapes, " i bought it and it's ok but I will just keep it because it does pretty darn good" type of stuff.
Just picked up a NIB Minolta 35-70 f4 on EBay out of Canada for cheap cheap cheap. That should mke a decent walkaround until I can afford a G.