I would probably tend to keep the Zenitar, just because it's such a neat lens, and it's fun to have one that I got straight from Russia.
Alvin, thanks for the welcome.
WDW was great as always, it was our first trip as Disney Vacation Club members so that was fun, too. We're going to visit Disneyland in September while we're out that way, so it'll be fun having the 10-17mm by then. It was either upgrade my DL to a K10D or pick up a couple new lenses before the trip - all the Benjikan talk of the upcoming cameras is making me wait to see what's announced later, so lenses it is! Already got a Tamron 28-75mm F2.8, getting the 10-17mm, and maybe keeping my eyes open for an interesting M42 lens if one crosses my path. Feel free to poke your head in over that the Disboards photography area if you are a Disney park fan, it's a really friendly and fun place and there are a few of us flying the Pentax flag there.
Back to the 10-17mm, I got a reply last night (surprisingly enough) from Buydig, they said that they don't know when the price will go back to $409 but they hope it will soon. I guess I'll keep an eye on it for now... otherwise I'll probably just have to pay the $429 from them or Beach. The CA is a bummer (especially since I'm going to sell my old Vivitar 400mm M42 lens because of its CA) and I've never had much luck fixing it in software even with Lightroom's tools, but it sounds like it's pretty much par for the course for a lens like that.