I've been using the 105 Micro Nikkor for the past year now. Excellent quality and 1:1 with no extension tubes or attachment lenses. A bit expensive, but worth every penny.

AF is not that fast, but then MF is supposed to be used most of the time.

The good thing about the lens is the working distance, which is large enough not to scare bees and such.

For illumination I bought an el-cheapo ring flash (comes under various brand names, mine's a TOPCON) and have been using it with a reasonable success rate.