In reply to The Lemming:
Here's how gore-tex works:
It's a semi-permeable membrane which allows water vapour, but not liquid water to pass. Your body heat causes condensation and sweat to vaporise & the water vapour goes through the membrane. Fairly critically you need free flowing air (ie wind) across the outside of the membrane to carry the vapour away. Which is fine in jackets, gloves, hats etc.
In you boots though, you've generally got a pretty tough outer to stop abrasion ... this prevents air flow over the gore-tex and compromises the effectiveness of the membrane: ie your feet will still be clammy. Moreover, if you "proof" the outside of the boots, then no way can the gore-tex work.
Furthermore, manufacturers only line the upper of the boot with gore-tex and not the sole, so there is a seam at the bottom of the boot which must be proofed or it will leak (refer to the previous point on proofing and spot the obvious contradiction in gore-tex boot care for yourself).
All-in-all: gore-tex boots are a gimmick. Best advice is to work out what you're going to use the boots for, go to lots of decent shops, try different makes, stiffness etc. and then buy the most appropriate boot in your price range. If it has Gore-Tex in it, fine, you've got a pretty label but that's all.
Enjoy.
PS: I was obliged to buy a pair of Scarpa gore-tex boots as part a company uniform ... had them a couple of years and they leak like sieves. Natch.