How does aftermarket Navi compare to OEM Acura TL Navi...For example this one, http://cgi.ebay.com/ws/eBayISAPI.dll...tem=1338805297 Is it good? I guess, I need to know, which aftermarket Navi I should go for...

Also, what are some things that OEM Navi has that aftermarket doesn't or vice versa..? Thanks.

 

I am sure A/M nav will have lot more function, like different voice, etc. But it can't be look better than OEM. :p