Thanks everyone for all the comments.
Pappy - I did indeed see that guide, and it's incredibly thorough and very useful. The watches on that other site weren't on the guide though (unsurprising given how many fantasy Patek reps there are), so thought I'd check!
Emuozz - I must say I will have to disagree with your Kinetic comment! I've bought two kinetics direct from Seiko, and they both conked out within 3 years, losing time and power reserve. They are also extremely expensive to replace, so not for me any more!
In any event, I'll def stick with the rep dealers here, no reason not to. Happy hunting and happy holidays to everyone!