2011 Tacoma - In need of a serious Audio Upgrade. Deck suggestions???!

Hey guys, as you all probably know, the stock stereo in 2011 Tacoma is absolute garbage. A little shocking considering how much the truck is new, anyways, im looking to start with the deck and move on from there. Any recommendations for a mid level deck, that will work well with iphone 5, bluetooth, etc..
As for speakers in the fronts I was thinking going with the JBL GT0938. Are the stock tweeters worth keeping? Back speakers I was definitely thinking of leaving as is, unless someone has reasons to change them. Would like to get a small 8" sub to fill it out. Still looking for a 4 channel amp option.

Appreciate it. Thanks!!!

 

For a single unit deck looking at the Kenwood KDCBT752HD..thoughts?

 

Price limit for deck? Tweeters are not worth keeping... they are not even tweeters but tiny mid ranges intended to supplement the factory woofers with tiny magnets. I have a double DIN nav Kenwood and like it a lot. Everyone seems to run PDX amps round here.