Thats what I have and it is adequate. We mainly use it at low speed , it does need to be turned up loud to be heard over the wind noise.
What I want to add is the ipod attachment so that it acts like a cd changer. I believe that one is available so that you can plug the lead & ipod in the back of the unit this then powers the ipod and the head unit displays the tracks and can control the ipod. Leaving your ipod nice and dry(ish) in the console. (http://www.clarionworld.co.uk/stock/ea1251e.asp
Also be aware that when placing the speakers the whole console acts like a bass bin!