nlpunited, not sure how much I can help other than I've been on a similar quest for awhile, albeit in a higher price point. I discovered multichannel high res music a few years ago and currently listen on our home theater. I would love to do more listening at my desktop. I've read that, because of their limited vertical dispersion, ribbons and amt-like tweeters aren't great in extreme nearfield. I don't have a budget, I just feel when I decide on a pair I'd like to buy, if I can't currently afford them I'll just save up until I can.
That said, the least expensive pair I'm considering are the Totem Acoustics Kin Mini speakers at $499 a pair. Great reviews for desktop, can be ordered from them and there is a 30 trial period.
If that's too steep a price the only other model I'd suggest would be the Ascend Acoustics HTM-200 se. They're sealed, lots of great reviews and cost $298 a pair with a 30 day trial. I currently own Ascend's Sierra 1 LCR in our living room and enjoy them greatly.
Hope that helps a little.