Might I suggest the Sony MEX-XB120BT CD receiver. “Its built-in Class-D amp delivers 45 watts RMS per channel — 100 watts of peak power — equivalent to what you'll find in many 4-channel car amplifiers.” That’s about double the output of the Kenwood.
That rating is also taken at 16v which you won't get in a truck, and at 1% distortion.
Still probably sounds good enough for most people though.
Kenwood takes there numbers (most 22w rms) at 14.4v and less than 1%.
In reality when you look at the numbers they are pretty much an identical output if you run the same testing method on both
Just pointing out that one companies power numbers may look great compared to another, but how they get that number can be questionable.
Sony was going to be a 3rd optin to my post. But I figured pioneer and Kenwood gave a lot to look through on their own lol.
Another one I've used and loved was Alpine. But they don't have much power because they expect an amp to be used. And they're a tad more $$ usually.
As a side note in my multiple years doing comp stereos I've had Kenwood's and a pioneer fail.. and my buddy lost 2 Sony's.. abuse was involved in all of them

.. But I've never had an Alpine fail.
I didn't suggest Alpine due to the mention of not running an amp.
If your GTOs are 2 ohm, and you need an amp, go with any small 4 channel name brand amp you find for cheap online and you'll be able to bridge 2 channels to make it a 3 channel for your door speakers and 1 sub later.
Onlinestereo.com
And soniceletronix.com are great places to look. I've bought from both and had good luck both ways.