looking for advice

I am looking for help on increasing my DPS.

I do not plan on raiding, but i would like to be able to get into (and perform decently) in cata heroics. I am not really into raiding at this point, but may be interested way down the line.

What I would like is info on what gear upgrades I should look for (and where to get them) in order to first get into heroics, but then in order to up my DPS.

I currently avg around 5.5-6.0 K dps in 5-man normal dungeons. I havent really been able to find how to increase this significantly. Most of my gear has no gem sockets yet, so that may be a future investment that i need to make, but I would be interested in where I should reforge/enchant my gear for maxing up my dps.

My current Rotation is mostly Arcane Barrage and Arcane missile (when available). I use Arcane Blast or Ice lance when neither of those are available. I also use Flame Orb when avalable and on Bosses use Mirror Image for extra DPS boos.

Any advice will be seriously considered.

Also is there any arcane mage guides similar to the fire mage guide stickied on this site.
Arcane rotation is fairly simple, Arcane Blast (because it builds up stacks making it hit harder) then Arcane missles on proc (because you dont want to have four Arcane Barrage stacks going or youll go oom in a heartbeat). It's fairly simple, just spam Arcane Blast till Missles proc then rinse and repeat. Also, pop your cooldowns (usually at beginning of boss fights) so use trinkets, Mirror Images, and Arcane Power and you'll be doing 10k+ dps in no time! :)

I hope this was helpful.