Currently have an 05 Corolla Ascent, with the standard MP3/CD Double Din headunit. I was planning to, sometime in the distant future, change it to an all in one GPS/DVD/MP3/Bluetooth type unit. In the meantime however, I was thinking of changing the headunit to the newer Toyota type. The ones which come with the new corollas. Either the standard http://cgi.ebay.com.au/TOYOTA-CD-MP3-SINGL...A1%7C240%3A1318 Or the Bluetooth/Six Stacker CD http://cgi.ebay.com.au/Toyota-Bluetooth-6-...A1%7C240%3A1318 I believe even the newer standard headunit would suit my needs better as it has an Aux in, which I can use with my iPod. I believe this should give me better sound quality then an FM transmitter? So I was wondering if these newer headunits will fit properly and function in my older corolla? Is it easy to install, and does anyone have any instructions? Also, would it look alright? These units don't have any curves or slants in the fascia or anything which would make them look funny in an older corolla do they? Are the edges of the fascia straight? Any help would be appreciated. Thanks.