The 135 certainly seems the simplest option. I'm looking for image examples on flickr now. I doubt I'd lose an entire stop by adding 14mm of extension to the 165mm. Others have recommended a +1 diopter with this lens, but I'm wary of cheap diopters ruining good glass.

I seldom use flash, so the leaf shutter lens is not an attractive option for me.

The 200mm focuses slightly closer than the 165mm, so it must offer tighter shots. I wonder how tight?

Nice shot from that 150mm. I'm begining to think it's a good alternative to the 165.