thanks for the encouragement all. i didnt necessarily get the 85/1.8 for low light, but got it thinking it would be a versatile lens (within my budget) to shoot outdoor sports/events, portraits as well as low-light event photos (i.e. concert, recital, carnival, etc). i got in with the expectation that it would be the do-all foot-zoom lens, and in a way, it is, but at the same time, i'm not so used to foot-zooming as i thought, and sometimes it's difficult to reach the right distance/angle when the FL is locked.
i also recently realized i take lots of close up group shots, and the 85mm on a 1.6x crop doesnt help to let me come close enough. (forget about using non-external flash on the 85!) of course, this is where the 50mm comes in to save the day, but when i do this, i realize the 50 doesnt come off...haha
i'll keep the lens and try to put more practical use into it. i fully agree it's a great lens, and as i get better, i can take some awesome shots with it. it certainly does help me appreciate a zoom lens when i decide to purchase a good one.
once again, thanks all. if only my 85 could hear you guys..she'd feel so loved. 
Off topic, but in looking at your sig, I see that you have the 18-55 "coming soon". Are you buying this lens separately from the camera?
yea...i originally planned to go primes to start, but decided to get a used kit lens to figure out which walkaround zoom-lens i'd like to purchase in the future. as it turned out, i found a person who bought the xti w/ kit and decided to upgrade from the kit lens. the person gave me a good deal and considering it's new, i took it. (of course, i did plenty of checking to make sure the user was dependable)