This is me, im balanced, i blow through almost any other twink 1-on-1 and do near most DPS in group (depending on who im with).
im not even close to how twinked i want be, but this build works out great for me:
http://ctprofiles.net/3295346
um...i have over 20% crit chance... whats up with that?
i own agi rouges, and stam rouges just take longer, but is very possible because i out DPS by a long shot. fellow balences are another story.
if i got 100 to legs, 15 to gloves, arena grand master and fishing hat (with 100health) and shadowfang/exalted dagger (very close to exalted

) and either duel crusader or 15 agi off hand, im going to have to say that would be the best rouge out there. no joke.