been doing some research on tabs... Ive narrowed my choices down to these 6 tabs, all of which are 7-inches and should fit nice on the 350z:

Asus Memopad - fast cpu/gpu, dull colors, bad blacks, good rear camera
LG G Pad - decent picture/video quality, has IR, awful cameras, cheapest price
Nexus 7 (2013) - best ram, fastest cpu, best resolution, tallest in size, video quality is bad considering its 1080p, no microSD, good rear camera.
Samsung Galaxy Tab 4 - smallest, good picture/video quality, slowest cpu/gpu, good front camera.
Samsung Galaxy Tab A - smallest, best picture/video quality, great cameras, new 2016 tablet.
Asus Zenpad Z370C - high price but not highest performance.

These tabs can be found used on Ebay for about $50-$100 (except for the Zenpad) for a decent unit. You might think the Nexus would be the obvious winner because it has double the RAM, fast cpu, and 1080p res whereas the rest are 720p, but the Nexus still doesnt look as good in video/picture quality as the Samsung Tab 4 for example. The Nexus is also priced a bit higher @ $80-120 (used). I personally would chose either the Tab A for its compact size, or the Nexus7 for the raw power and 1080p.

Anything that you could add about tablets and the 350z would be awesome

UPDATE 1: I found the Nexus for only $80 so im gonna see how it fits. If it doesnt work well, then im going to try the LG G-pad. I would get the Tab A but it doesnt have home/back buttons in landscape mode... I wonder if that can be changed with a custom ROM or launcher...Anyone know?

UPDATE 2: I found out that you can root the galaxy Tabs (4 and A) so that you can disable the factory home/back buttons and enable the "google navbar" so that home/back appear on screen in landscape mode. With that said, the Tab A might be the best choice...It can currently be found used for $80-100 and around $120 brand new. Best bang for buck imo.

UPDATE 3: Im starting to think a 9inch tab in portrait can also work as a dash tab in the 350z and I havent seen anyone do it yet. It actually might be very easy to install. it would require you to delete the cubby altogether. Mount the tab to the back of the center dash and design some inserts to fill the empty spaces. Would look pretty factory if done right..