I'm not sure what else there is out there that would give you 7 seats and match up with the Santa Fe for value for money. It's a shame that in 2010 they still don't have bluetooth as standard. Peterborough Hyundai pointed me in the directtion of these guys:
Car Audio Company in Fengate, Peterborough (UK) - In Car Entertainment Ltd t/a ICE Direct Ice Direct. Apparently they will install one in minutes for around £125. They have all their systems set up so when you go in they can demonstrate all their products. Will be putting my head round the door tomorrow. I'm also getting a bespoke liner made up for £90 that has a flap which folds down over the rear bumper, rises high up the sides and extends all the way forward even protecting the back of the front seats when the back ones are folded flat. Sould give me a large enough area for dumping everything I accumulate. Oh and privacy glass to keep away those prying eyes. They do 5 levels of darkness so went for level 4 which should be dark enough. If you do go for the Santa Fe i've heard a few worrying stories about the automatic failing, they might have fixed it but I went for the manual. Not just because it was cheaper and better fuel economy honest.