As long as you're got enough HDMI inputs on the TV for video to fill your needs at this point I wouldn't worry about HDMI in the receiver.
I don't think any of the Onkyo HDMI equipped receivers decode the newer audio format, ie. Dolby True HD, DTS-MA, PCM 7.1? So, even if you get a receiver with HDMI, you still need to run 8 analog cables.