Dolphin - I would recommend Apex - given that - what kind of diving do you plan to do in the future? I know the Apex ATX200 is the latest and greatest (really light, low profile) - but do you really need to spend that kind of money?
I own an Apex TX50 (TX40 Octo) - and am very happy with it - couldn't think of any recreational dive opportunity where I would want 'more' in a reg - and it is a highly respected tec reg, nitrox compatible and good for cold water diving.
See if you can try the other Apeks Regs (40, 50,100) in a pool - I doubt you'll be able to detect much of a 'breathing' difference - than determine how much you want to spend. (Of course leaving additional money for more toys later! <S>)
-Jim