Just bought 2011 platinum, need head unit recommendations

Hi guys, Proud new owner of a 2011 platinum with only 57K miles. I love it, but as I was warned the head unit is not up to par with modern phones/technology. I want a drop-in replacement that's going to sound good but there are so many variations of stock stereo/speaker setups over the years I'm just not sure what applies to me. The last time I replaced a head unit was in the flip phone era, just to give you an idea.

For example, I know Crutchfield is full of info but for some reason I find this notice they gave me confusing. What impedance are the stock speakers? I realize I need some additional wiring harness adapters to keep my steering wheel controls, etc. but do I need to get an amp in addition to the head unit??

Also, here are some pictures of my truck because everyone loves pictures.

 

Check out the Kenwood Excelon units

 

You probably don't need an amp. Here's a good thread to review.

 

Factory speakers are 2 ohms. Buy a head unit with idatalink maestro to retain factory amp and steering wheel controls. Crutch field sells a service where they wire the harnesses for you so it's really plug and play when you go to install for $25.