Durability-wise, I doubt you will get a different transport between those, and that is what breaks (along with laser) so it should not be much different. Maybe once you go into some much higher price-ranges and even then who knows. I forgot the number, but there are only so many makers of CD transports. Some years ago even Philips exited and they were the staple among many brands. Some brands make their own but I doubt those are $300-500-700 players.
Soundwise, check specs and what DAC chip they use. for the biggest difference. Remainder seems to be smaller increments. Maybe, once you see the pattern in DACs and price, you could even pick the cheapest one with that better DAC.
I feel that more expensive models, even in your price range, may feel to be better built. Sturdier. I am sure it is supposed to be better for sound but have no real idea.
Or, why change the team that is winning? There is one just like yours on eBay.
And then, of course, you can always buy a $300 player, add a $225 fuse and end up with a $15 000 player sound. At least that is what the rumor is.