I'd have to go with ETN (used to be ETS Global), but they are on IRC.
The best two forums for trance socializing, especially where to learn shit from is believe it or not.. DI.fm and TranceAddict.com (both have been around for a LONG time).
I have a pair of Technics SL-1200M3D decks, and even though I stink at mixing, due to no time for practice, I learned A LOT on those two forums and the IRC channel. Records aren't as expensive as many people think, just don't buy the imports from expensive spots like Virgin Megastore.
The interwebs has lots of really great shops that many times bundle the shipping costs of UK/DE/NL to the US with the actual price and it comes out to less than buying it locally. But I'm a fan of supporting local shops, so when I used to buy them, I'd buy majority online and buy the expensive ones locally.
Also.. being that you have DJ experience, and trance or house or whatever you're getting into may be different from stuff you used to spin, but PLEASE do NOT go the CD turntables route, even if it's so much easier. There's a lot of cool shit you can do with mp3's and laptops too nowadays that you may not have had available years ago, still better than CD shit.
