system rocks. I personally am liking the post from ajrettke about dual monitors. If you can't live without spending that money, look into throwing up another monitor. I play SWG and think it would be very useful at times (since I commonly use online resources when playing). Your RAM is fast enough (if all you play is EQ and don't have a desire to get into some late breaking high end games - HL2, D3). 2 Raptors in RAID 0 is plenty (da*mn!) I enjoy the dvd burning thing. And with no more late fees at Blockbuster.... oh happy day. The vid card... as was already posted, there is not sense in upgrading this fine thing. You don't need an Ultra, especially for EQ (I'm sure EQ is getting annihilated by that).
I have heard that EQ2 is a memory hog, however, and if you're planning on jumping into that you may want to up it to 2gigs. I played the tutorial to EQ2 and was so fed up with it after that that I haven't logged back in. Glad my friend let me borrow his account name to give it a test run, saved me $50.
To sum it up, either save the cash or go dualies. The 15k HD sounds nice, but I don't think it's worth the price at this time. Maybe in a year or two when the price has come down. Also not worth it since you already have 2 Raptors in RAID0, I doubt you'd see much performance gain.