2.7 Advice Needed

[goldkey]

I'd like to ask the community's advice:

I have two video sites that I need to launch...one using On Demand, and the other using TV Elements. I'm holding off because I understand that WordPress 2.7 versions of the themes are around the corner. I'd hate to build the sites and have the old-style comments on a few posts, then have the new threaded comments on others. But I don't know when the 2.7 updates will be released.

Opinions needed: Would it make sense to go ahead and launch with WP 2.7 and the existing themes? Would it look silly to have a few pages of non-threaded comments? Or would I be better off waiting? I'm very particular about consistency and such.

Any advice will be appreciated.

Happy Holidays!!!