Rega Apollo's RRP is £600 (assume this is the one you're talking about?). May find it cheaper though. There are literally dozens of CD players around the Marantz 6002 budget though. Don't get me wrong, it's a great player, but I can't say get it, it's exactly what you need as I don't have your ears! Seriously, try and pick up the WHF Ultimate Guide to Hi-Fi (was available in WH Smith when I was last in on Tuesday and only costs £4.99). It's got literally loads of options in there - best bet then is, find a few dealers near you and phone them, find out which ones they have in stock and go take a listen (taking some of your favourite music CDs with you). Only you can decide which is the best player for your ears (as this forum has shown time and time again from people saying they're not happy with a combination of 5 star rated components system they've just bought but didn't listen to).
I'm pretty sure the guide will help you decide where's best to spend your money once you've found your ideal CD player as well!