Most any of your video systems will have the steering wheel remote input wire. They will all however require the use of an adapter. The PAC steering wheel interface will depend on which brand of radio you get.
I guess the first things you need to decide is how important certain features are to you.
Bluetooth hands free calling?
Other accessories like XM, or Sirius, HD Radio ect......
Once you know the features your looking for it makes it easier to narrow down the selection. I always strongly recommend to my customers to stay with a major name brand when shopping for an expensive system like these. There is nothing more frustrating then buying a nice $800 or more system and having issues with mapping or touchscreen or the unit flat out fails which is really common in most of your cheaper loaded feature decks.