Seriously looking into Private Servors. +REP for help!

I'm seriously looking into joining a private servor but i know stuff all. Is there any really well known private servors? I want one that works with TBC and has a high XP rate.

Another thing i'm worried about is;
Will i loose my current account on the official WoW game?

If anyone can help please post some basics that is readable :P Not pages and pages that i wont understand! And any link onto any well known high XP rate + money rate sites. Thanks! :D

You won't loose your current account at all. Check out this list here;

http://www.wowstatus.net/serverlist.php make sure you get a Europe one I think.