Genuinely excited but can't decide

[Alphablue]

The hype for Green is really building for me right now to the point of taking tomorrow off work (filthy casual I know), but I can't decide on a class since I suffer from extreme alt-itis.

My options are:

Warrior
Shadowknight
Rogue
Bard

I enjoy Warrior for the tanking, crits, and desirability in groups.
I haven't played a Shadowknight on P99 yet.
I enjoy Rogue damage and ability to go almost anywhere.
I enjoy the extreme utility of Bards.

I want to primarily dungeon delve (going to buy some real estate in Guk since I'm always there) and want to be able to get into groups quickly. I like tanking but have done it quite a bit. I won't be able to play consistently, so I want to play something that can get into a group quickly and be useful.

I just need someone to grab me by the shoulders, shake me, and tell me what to play.