I still prefer the iPod touch to these, but I would definitally consider one over a different iPod if they had OS X support. I think that these are the best competition to the iPods currently out there.
I hate how people say that MS is the best competion for iPods in this market. They are the only competition that really markets their player, due in part they got some good amount of money to spend on marketing.
Lets see we have Creative Zen 16gig of flash, plus, SDHC support, so in theory 32gigs of flash, and very good sound from what I hear. Comes with voice recording, nice video support, drm-free AAC support and is priced competitively.
Cowon i7, UMS, and has many features, like voice recording(nice if you want to record lectures), line in, full range of video and audio suport and comes in 16gig. Cowon D2 similar feature expect it comes with a 2.5in touch screen, and in 8gig with SDHC support. Not to mention something like 50hours of battery out of it. And Cowon has fantastic audio quality.
Archos 605 wifi, comes in 4gig of flash with SDHC support, 30gig, 80gig or 160gig. 4in wide touch screen, records audo, and video(granted with a dock that cost extra), a wide array of codec support for video including h.264. Opera browser, and wireless syncing.
I can go on...
If the new Zune 80 is on par in terms of sound and video quality I may over look the fact that it does not come with divx, and ogg support and the fact that is has no UMS support either. Not to mention if this has a better screen than the Cowon X7(if that ever comes out), the next Creative HD player(if they make one) or if I can't wait any longer for a 16gig+ Samsung P2. Then again LimbMTP or whatever should be able to work to with the Zune. ATM