as far as the A700 goes, at first I thought that might look pretty sweet next to the 109, new all-metal meets old all-metal but I can't imagine it would be so noticeably better as to justify the extra cost, which is probably all mark-up anyway since it can't cost that much more to manufacture an all-metal reg vs a plastic and metal one. Also, I find it interesting that the owner of the shop barely mentioned the A700, other than saying it was an option. He said more about the S600 than the A700, and even that was less than what he said about the G250v. I imagine that if the A700 really was THAT good, they would have promoted it especially if they make more money off selling a more expensive reg (maybe they don't, but it would make sense). Both the salesguy and the shop owner were promoting what they (at least claim to) use.
ams511, I just took a look a the Halcyon website. wow, somebody swapped the colors and thought scubapro is spelled with a H.