Well IceFire, you picked the exact RAM that I priced into my ballpark price system, so I'm glad to see I'm picking the right components.
The monitor I've selected (for now) is the 22" Samsung SyncMaster 226BW, 2ms lag time and 3000:1 display. That BenQ is on the list and comes recommended by ArsTechnica, but its a little pricier and I've heard great things about this Samsung. Then again, it all depends on the prices when I go to actually finally configure and buy this thing.
...about assembly...
I've rebuilt my current PC three times, assembling it entirely from components once. Having done that, I have precisely NO desire to do it again. I don't mind swapping components during upgrades but if I can pay these guys $40 to do it for me (with all the cable management) then so much the better. My friends and I all buy our hardware from them now, we've all had great experiences, and I trust their techs. There's really no reason for me to do it myself when I can walk in, pick up the assembled system, and know without a doubt that its assembled correctly and as efficiently as humanly possible. So yeah... I'm not doing it. Not out of fear or inexperience, but out of convenience.