Not that this really is what you're looking for per se, but if you need to find a reason to be excited about this console, I very recently wrote a review of it to inaugurate a new blog:
http://www.retrodrunk.com/2018/02/console-review-pc-engine-duo-rx.html
I LOVE this console. It's really hard for me to pick favorites, but it's one of the stronger consoles in my collection. Like Newsdee said, the Turbografx-16 was poorly marketed in the U.S., and it was too late in the U.S. It didn't have a enough time to really wow people; soon enough, "GENESIS DOES WHAT NINTENDON'T" was all over everyone's TV screens and consumers bit (not to mention that Sega actually aired an ad that mocked the Turbo's alleged 16-bitness).
If you're a video game collector at all, I would recommend it. My review above covers most of my opinions about the hardware and software. If you really don't care for shooters at all, I might hesitate at all, because that is really the primary strength of the console (and the variety and caliber of shmups will literally blow you away).
Love it!