Well. I suppose the first question to ask yourself is, do you care to listen to SACDs or DVD-As? Then you'll need a universal player. But if you just plan to listen to standard cds (Redbook cd) then you have more options. Things will narrow down to your listening prefernces (the formats just mentioned), your particularity (do you need to hear every nuance...or the fact it just plays is good enough
), and of course price.
There are a number of threads in these forums to occupy your curiosity. Just go to search and type in 'cd player' or 'universal player'. Don't forget to adjust the date range. It defaults to 1 week, and you'll probably want to look back further than that.
Good luck!