I'm looking at several cars and wonder if there is a difference?

Also, I noticed the head unit in the Bose equipped '06 I drove was hard to read under indirect sunlight. Is there an easy way to swap it out? Also, is it worth it to find a nav-equipped car? I like to have nav handy, but with an Iphone, i have that everywhere...

TIA

 

06 has tire pressure monitors. My 05 has aftermarket monitors from Tire Rack, $165. Garmin makes good navs.

 

Thanks for the reply. Anyone else care to comment on whether aftermarket head unit & speakers can be easily swapped out. I would also like to know what coilovers can go on the car to lower it and improve cornering ability? H&R, Ohlins, etc?