I guarentee you can keep the steering wheel controls, just get this adapter: http://www.amazon.com/Metra-ASWC-Uni.../dp/B0039H2W66
Works perfectly with my JVC AVX-640, very responsive as well unlike some similar adapters with lag...
The wiring is the only con, seems VERY confusing at first, until you stumble across this page: Axxess Interface - Steering Wheel Control
^That will ask for your car etc. and then you'll know exactly how to install it.
I always laugh when people get worried about steering wheel controls, there's a reason why any headunit that isn't complete crap (like Boss/cheap Sony/etc.) has some sort of steering wheel input, because you can ALWAYS find an adapter to retain or add them.