Yeah, I think compression socks are pretty rad, but they're really expensive. I used Dissent and CEP socks for all of last season and none of them are losing their compression. They provide the best fit I've ever experienced, and the Dissent Nano Tour is fantastic for touring or really tight boots. I also feel like I get a little less calf fatigue in Dissent socks vs. regular ski socks.
All that said, I'd have a difficult time justifying them if I was actually paying for them. If you don't need the most precise fit, I'd check out FITS and Smartwool.