CKS must've sold out of men's Comp LX's
BOC has a med. for $210 if you can fit in that or large for reg. price of $295:
Boulder Outdoor Center Kayaker's Store Products by Immersion Research Competition LX Dry Top L/S
Don't really know anything about Peak's products yet. There was a lot of talk last year about their creek jacket that has pads you add to shoulders/elbows but I haven't heard much since then. No idea on how their quality is long term.
You can't go wrong with IR or kokatat- but honestly you haven't even been out boating yet so there's a chance you might not like it or might get spooked and give it up. Who knows- it happens to a lot of people.
I'd say, for now, if you're not in a real hurry to get it, keep an eye out for deals. Keep checking the swap on here (there's a guy with two Kokatat Gor-tex tops on there right now- the listing is older but he might still have them). People will sell their boating gear to pay for ski/board gear.
If you need to get it right away? Buy the Peak on sale at CKS for $175. It's probably not going to be as good as an IR or Kokatat, but I think they're a fairly reputable company and it'll be a good enough drytop to get you started. If after a few years you're still sticking with it, then you can start looking again for the top of the line. Yes, I know everyone will say that it's much cheaper to lay out the $400 now than buy both- which is true, but that comes from all of our experiences of doing a similar thing. And most of the people on the buzz have been paddling for quite a while. It's hard to drop another $400 after buying all the other gear for a sport that you don't yet know if you're staying in. Hope that helps some. (And who knows, maybe you'll be on here in 4 years or so telling newbies about how great your PeakUK drytop is and that you got it at a steal for $175)
As far as the convertible goes, I wouldn't get it just because of climate. PA's water isn't going to be as cold as CO, but it's still fairly cool there (from what I remember). And like gh said, it's easier to cool down when you're out on the water. Just roll.
PeakUK's website for Bob or anyone else interested: