My experience mirrors Jamie's, I have 4 modern TI razors, two 11/16, and two 6/8. Of the 4, 2 are expensive and two are 'basic black' series. One expensive razor and one cheap have uneven bevels on one side. Both the 11/16 have even bevels, both 6/8 have uneven bevels. All shave very well.

I'd have to caution against the more expensive, fancy TI razors, or at least understand what you're likely to get. You're paying a lot for bling and the chances of getting a razor with an uneven bevel according to my experience is 50/50, and the more expensive ones are not necessarily ground better than the cheaper ones. Inexpert grinding is not exactly what I have in mind for a $300+ razor since it loses a lot of resale value, though not a deal killer on the cheaper razors like the basic black series which The Invisible Edge sells since they do shave very well and hold a good edge. I'd prefer the BB series to a Dovo Best. Another positive for the cheaper TI razors is that you can have them re-scaled much, much cheaper than you can buy nice scales from TI, so unless you just have to have the fancy metalwork, this is IMO the way to get a nice TI and cut your losses if the bevel is wonky.

Cheers, Steve