For the radio, I went with a kenwood DDX9904 and Maestro. It worked EXCELLENTLY and with the connectors premade from Crutchfield, the install is very painless on that. (The DDX9904 is no longer available, but the successor should work just as well. With Maestro, you have to do a firmware update and set up the buttons however you want them to work (it is very customizable and the setup guide is fairly straight forward). Once you do that, you have access to ALL the original vehicle settings that are available in the OEM stereo as well as a few extras with the Kenwood (like live tire pressure).

I actually am trading my 14 in for a 20 and just had to put the factory radio back in to trade it in. It took me 15 minutes to pull the old one and re-install. That should give you an idea of how easy the install is. (Took longer to install because I wasn't sure about everything and stopped to look up every little detail)
Here is the install video:

For the Tow Hitch, I went to E-Trailer and got the 2 inch Curt. Install would have been painless if the threads had not been boogered up. I would get a tap to chase them out prior to install. Wire brush did not cut it. (Have to check with the etrailer site to get the threads as I do not recall exactly what they were. I want to say it was a M12 thread, but don't remember course or fine) Other than that, it was easy to self install without the need for a helper.

Factory crossbars can be had at many online dealerships. I got mine through 2013-2018 Toyota RAV4 Roof Rack Cross Bars - Black 2013-2017 Rav4 PT278-42151 | nashuatoyota

 

Jesus! That is an expensive setup!

I was thinking about getting the 9-inch radio that SYGAV sells because I could save $40 dollars! I paid less than that for my last winter beater car! ;D

OK OK I spend more than that on guns and I buy a new one about once or twice a month. I've just never thought of spending $1000+ dollars on something with the name Kenwood on it, maybe Heckler & Koch (HK) or FN but damn! ;D

 

It wasn't $1000+ for sure. Might have been $900 for the total setup altogether. But, that included adapters to allow me to use the integrated XM antenna and an add on to keep XM radio.

PS I spend more than that on guns as well. We just do extended road trips and like to have a decent sound and maintain all the factory integrated items. If you replace the radio without having a maestro compatible adapter, you are going to lose the functionality of all the buttons on the steering wheel. You also can't set up the things like whether all doors unlock etc and will lose the back up camera as well I believe.

 

Check craigslist in your area and eBay I see OEM and aftermarket upgrade parts on there. I picked up Weathertech mats and my cargo trunk hammock there. My 18 inch stock rims and tires from the platinum trim came from a salvage yard.

How about LED headlights and interior bulbs?

 

Skidplate and stainless pipe are available from LP Aventure as well. A bit more expensive though, the Northwoods skidplate also seems nice.

As for lift, there are a bunch of options. The only 2 inch is Readylift, otherwise look at Northwoods, LP Aventure or Eibach.

Tires is a matter of personal choice, I have run 3 sets of ATs on my 2014 and just recently switched to an HT type tire. The ride is a bit rough on these vehicles to begin with and with my lift, it was just too rough. Sound insulation is non existant. I was running Firestone Destination ATs which were OK but still a bit loud, and then BFG AT KO2s which completely ruined the ride, sound and comfort of this car. Those Hankooks should be OK, but I have no experience with them. If you are upsizing tires you want to watch tire weight, I would not recommend anything above 35 lbs, even that will be a big difference. The KO2s I had were 40 lbs each and the transmission struggled to get them moving.

Right now I am running Kumho Crugen HT51 in 245/65/17 and while they dont have the look of the ATs they are a nice wide tire - grippy in wet, handle well on dry, good traction on gravel and light off road, quiet, winter rated (although I will be running true winter tires regardless). They are basically the same tread as the trusted Michelin LTX M/S but quite a bit cheaper. Worth a shot checking out!