Oh gawd, I can see it now. Bet a 6 pack wouldn't go astray in that session.
I've got Scottys myself but only because they came with the kayak - got another so the holders are interchangeable. Don't see a lot of difference between them and Berkley's. From quality, down to how the holders operate seem pretty on par with each other. In fact, I almost got a Berkley the other day because I suspect they could be interchangable with the Scotty's. There's a big difference in price though, with Scotty's about double the price. Don't know much about the snap loc but have seen them at whitworths. Berkleys also have different accessories that go into the deck mounts, don't know if this is also the case for the snap locs.
I'm looking a getting the ram tube - baulking at the price. Its like an above deck rod tube. Good for mounting in a peddle hobie - you can angle the rod outwards and avoid having the butt sticking into the legs when peddling.