Thanks for the answer, friend, the truth is that here in Brazil the pro reaches twice as many with third parties, and the library of the sega cd in my view is weak, so my real "ambition" is to have a larger library, and if with the pro would be more of the same since my X7 runs everything, now if the pro runs the 32X without the additional 32x there it would be worth the price that arrives here in my beloved corrupt country.
While the Pro supports 32x ROMs, you still need a real 32x to actually play them. So it sounds like you’ve probably got everything you need with the X7. The NES core on the Pro is really neat, but as @zaphro72 says, it’s just a fun bonus feature, not a substitute for a full NES solution. Many games work really well, but it’s far, far, far from 100%.