That pioneer will do everything you want and more, has mirror link, touch screen reliability, time alignment, crazy good EQ and crossover functions and its reliable.
For speakers, these will do real well,
Precision Power PPI P65c3 6.5" 3-Way Component Speakers w/ AMT Tweeter
the 3 inch midrange will be in your stock location, the tweeter can be mounted on the A pillar or sail panel and the woofer will be in the doors. This would eliminate the need for rear speakers, they will overpower almost any rear speakers and sound 1000x better than if you get cheapo speakers in the rear and front.
This amp is one of the best budget amps that put out ridiculous amounts of power for the price.
Precision Power PPI P900.4 Phantom 4-Channel Amplifier
The subs can be
added much later on for the 6x9s, that ppi amp will power them just fine. For now however just amp your rear speakers. They can handle all the power and they can sound quite a bit better with actual power going to them vs the 5 watts your stock head unit puts out.
Tang Band W69-1042J 6"x9" Subwoofer