My vote is for the computrainer. I've used it now for one year (approx. 5,000 miles) and my speed has increased 1-2mph. What makes it great is that I can make my own courses like central park loop, perkins climb, gimbels ride, etc. Changing the course every time I ride keeps it interesting. Resale value on ebay is also excellent.

My choice is the Tacx Fortius - I Magic with extra.

Here is a link to some posts on it:

http://forums.bicycling.com/eve/forums/a/tpc/f/602104717/m/6551055922

About $1,000.00

We just bought one for ourselves as an xmas gift. Linda's been hogging it though, and swapping bikes in and out is a bit of a pain because of all the cabling involved. But I like it because I can load in real rides that I have saved on my GPS, or just create a track in mapping software and save as a gpx file, and their course creator software will create the course for you. I'm just coming back from a pinched nerve, but I did a loop of CP Saturday morning before leaving for work, and yesterday rode river road from Edgewater to exit 4 on the PIP and back, all in the comfort of my living room, and while watching a movie. I still haven't got all the bells and whistles figured out. I'm pretty much clueless to what the data in the reports generated from my rides mean. But the rides are a pretty good simulation of the real thing. Also their tech support is very responsive to questions, and software bug reports.