dim_span:
matthewpiano:£600 WILL get you a very good system new in the form of Marantz CD6003 and PM6003 - with a free pair of Wharfedale Diamond 10.1s at both Richers and Superfi at present. The Marantz electronics are superb for the money and well built too. Is there any give in the budget at all? I only ask because the Rega Brio 3 is only about £326 brand new and its a superb little amp. The ideal partner would be a Rega Apollo CD player which is £450, so total system is nearer £800 but will give you astounding results that I think you'd be happy with for a long time. 2nd hand the Pioneer A400 is a good bet as is the Rotel RCD965BX CD player. Rotel amps always make a very good buy as well. The RA01 is a great, relatively cheap buy with a very dynamic and musical sound.
just out of interest matthew, how would you rate the new cd6003, PM6003 and diamonds against the pioneer a400, marantz cd63 sig and mission 753's? (not comparing second hand vs new, but comparing soundwise?)
I'd have to go slightly different and compare CD6003/PM6003 and Mordaunt-Short Aviano 2 with what I know individually of the A400, and KI-Sig and also of my RCD965BX/A400/751 system.
I've done a lot of listening now having been in a similar position to the OP and having gone down the second hand route so I hope this helps.
I am a big fan of the A400 and the CD63 KI-Sig. I think they are excellent components and, at the right price, represent excellent value for money. Likewise the Rotel RCD965BX, which has a very musical sound and is well built. In my own system the more I listen the more unsure I become about the speakers - in my case 751s. They are brilliant in terms of dynamics and detail levels but I'm finding them a bit thin sounding in the treble with orchestral music. Sometimes strings can sound quite unsatisfying through them and, to be honest, I think its going to end up being a major stumbling block for me. Some of this might be synergy - the metal tweeters of the Missions with the brighter sound of the Pioneer amp - although trying my Mordaunt-Short MS25Ti (which also have a metal dome tweeter) shows that such speakers can work in this system (they are playing Fleetwood Mac now and sound very very good. Strangely enough I find the Quad 11Ls sound a bit too flat on the end of the Rotel/Pioneer combination, although I know from an earlier system that they work brilliantly when the Pioneer is paired with the CD63MkII KI-Sig.
So how does the Marantz 6003 stuff compare? Very favourably actually. The Marantz combo is very well balanced and runs a sort of Goldilocks line between the two extremes of brightness and being dull/overly warm. Instrument timbres are very well reproduced and, with the Aviano 2s on the end, there is plenty of pace and attack without it ever becoming clinical sounding. The CD6003 is more rhythmic than the Rotel (which does sound like it suffers from quite a bit of jitter) but feels better built than the CD63KI-Sig.
The Rega Apollo/Brio 3/R3 system I've auditioned would beat both options quite comfortably. Its only real fault is the Brio's tendency to harden up at very high volumes but this wouldn't really affect me as those sort of volumes would be pretty anti-social anyway. Its a very spacious and airy sound with great rhythm (same sort of PRAT as Naim), but it combines this with a real knack for reproducing timbres and hanging the whole thing together as a musical entity.
Apologies if there seems to be a lot of thoughts here but answering your question ties in with a lot of the thoughts I'm having myself at present. Hope it is useful.