Don't forget that's only for the spider; you need a head unit too. Theirs won't be out for some time, and the new Garmin isn't out yet either. I don't believe there are any other choices....

That being said, I just got a SRAM S900 for my TCR, replacing the Rouleur (not carbon), which is going to my cyclorcross bike I'm building up. I needed a new crank anyway because of a) the new frame, and b) I wanted to switch to a standard 130 BCD. I am likely going to get the new Garmin when it comes out, so I'll be all set to get the Cinquo if the initial reports are positive. I also have the S-Works carbon crankset on my Tarmac so I may get that too, or instead.