For all those who have replaced their factory head unit

I'm looking into a replacement for my receiver and I have a basic question. Am I correct in understanding that to retain full factory iMID functionality, you need an iDatalink module?

And does anyone know of a head unit without a touchscreen with iDatalink functionality? (My research on Crutchfield is saying no to the latter question.)

I've got a 2014 Civic LX without "Display Audio" or "Premium Audio", so my only display at the moment is the iMID. I'm aware that I can retain steering wheel controls and the backup camera (the latter isn't hooked into the head unit so it's no problem--I had the head unit completely removed and my backup camera worked fine, so I know for certain that's not an issue) with the right adapters, but it sounds like there are problems with what the iMID displays (mpg, etc) with a basic replacement unit.

Thanks.

Oh, and has anyone had a problem wiring a touchscreen head unit to the parking brake in a manual transmission? Not sure if that would be an issue or not.