What's the best approach?

With limited exposure to various electronics, It would be wise to consider a system based an a single manufacturer. This would in theory resolve the issue of component matching. For instance, If you plan to go with the Proacs, you should consider the ARC products at your price points. Likewise, since you pleased with the Naim products, why not go all Naim. A CD5/82/250/D15 system would be quite awesome. Used gear would only extend your budget a little.

Good luck and welcome back to the High-end fray.

Matt

Matt,
Good points on going with a single manufacturer. BTW, what are ARC products? As for Naim, it just happened to be what the dealer had driving the Proacs. Not a big Naim fan, in fact, the gear seems rather proprietary and esoteric, although the CD5 did sound noticably better than a less expensive Arcam. Think the Naim gear just allowed the Proacs to sing their *real* song. Other components could do the same, perhaps?

Glad to be back in the fray.

I'd go out and find a really nice pair of speakers first - even if you hadn't posted a price, I would have suggested $2-3K used. Then I'd build up behind it until you were convinced they are the weakest link. This should take a while, and every step you'll hear a significant improvement.

By ARC I was referring to Audio Research products. There is wonderful synergy between these two product lines.

Source first v. Speaker - amp first. This will always be debated. Most Naimers tend to be first source folk. You should visit their forum at Naim-audio.com for some interesting discussions on this topic. My view is that within a budget the law of diminishing returns occurs at a lower price point with digital products than with other gear. For instance, the sonic differences between my Audio Note CD3.1x cdp($2400) and the CD2.1x($1400)are minimal. In retrospect I could have used that extra $1000 elsewhere in my system.

Likewise, It would not be unreasonable to allocate 40-50% of your total budget on the amp/speaker combination.

I would like to add that I have auditioned the D15 with a Manley Stingray. This was an extremely musical combination.

Matt

Find a pair of speakers that the very thought of puts a smile on your face. Pick the right amp to drive it. Since you are building from scratch it may be a good idea to build a passsive preamp system. Some people talk down a passive preamp setup and say that it compromises sound. I think all a matter putting together a balanced system, I've had it both ways and a well designed passive pre system will blow away an active pre system any day. To build a passive pre system you will want a power amp with high gain, high voltage sensitivity, high input impedence, and low output impedence. Sim Audio Moon W-3 or W-5 is an example for the power amp. Going passive preamp allows you to spend the money somewhere else. If you find that you don't care for the passive preamp setup, you can always add a pre later. Then pick a source with enough output voltage to drive the power amp, maybe with a volume control too. Select IC's and speaker cables last. Sorry to get on the passive preamp rant but I couldn't resist. I wish someone had given me that advice when I first got into this hobby.

Your budget looks very reasonable. I am sure you will find success.