I was wanting to add A/V components in the X. Does anyone have any opinions on these monitors ? These switch out your stock headrest. Just in case you don't want to cut the OEM headrest.

Also I was wanting some opinions on these 2 different Alpine head units and just wondering which is the best way to go.

CDA-9835 and DVA-5210
or
IVA-D900/IVA-D300

I know it's a lot to ask, but just wanting some opinions on these. Thanks.