nav/ backup headunit

[crazyikon86 5]

just got an 07 tahoe so getting all my things together to make a buy.

what head unit do u guys recommend that has nav and back up camera. looking for around 500 bucks. i have an android phone btw.

truck is non bose

what parts will i have to buy for the factory parts to work. pac?

i was going to go with knukoncepts rca and power wires. any other options?

subs to be installed are 2 12 ssa icons and sundown amp.