Hey Evan, thanks for the kind words. I am liking the bokeh just fine. Struggling a bit with AF at the wide end, but hopefully I will get it down.
Funny you should mention the 24-70L glass. I had a pro photog shooting the event I was managing last weekend. (I always chat up the pros when I have them trapped in my building)
Anyway, he had that L glass on his camera and after I asked him about it and told him I had just ordered the 28-75 for my pentax, he let me fire off a few shots with it. Man, in dim lighting it was amazingly fast... but I would guess the cost of the camera/lens/flash combo at $4000 ish, so it had better be fast. But what a nice lens. If you are saving your pennies for it then, may I suggest a penny drive. Get the family and friends to donate their old pennies to the cause....
So here I was with my little pentax and heavy old vivitar series 1 macro (MF) hanging from my neck, holding this pro gear. I had never felt more like a ___________. I thanked him and then went about shooting a few shots with my camera. After I got home and dumped them onto the computer I actually had a few that I liked and felt much better about my K100d and old MF lens.
Attachment 8873
Actually it was hard taking the Vivitar Series 1 off of the camera to put on my new 28-75... I really like that 105mm lens, the most fun of any of my old lenses.
But I need to put the 28-75 thru its paces and It looks like the weather may let me today..
Thanks again for the comments and good luck with the penny drive.