I've been in this hobby for over 25 years now and have owned and have heard many different set ups and have probably read countless more equipment reviews from numerous hi end magazines over the years and sold audio at the retail level many yrs ago as well.
Over the years, I've put together many different systems on the cheap that were sonically very good and the main thing is that it is all about system synergy.
It also gives me great satisfaction to get components that are considered "giantkillers" that cost way less than a lot of other stuff and that holds it own with gear costing 2-4 times more. There are many products out there that are "giantkillers" and great bargains to be had in this hobby and you can also get taken to the cleaners and by expensive stuff that is really not so much better.
So here is what I would do if it were me and I had $5K to play with. I would keep the system that you already have and use that as a secondary system. You are familar with its sound and can use that as a reference point.
I don't know much about the B&W 803d speakers that you are talking about, but a quick search showed that they cost $8K (unless I made a mistake in searching) so realistically, I believe that they are out of the budget.
But more importantly, what amp was driving the 803d's that make you like them so much? What other components were used in this audition? And how loud do you listen? Listening levels, your room size, and the speakers you get will determine how much power you really need.
You have Klipsch's and you like rock, jazz, blues, and big band. Have you ever considered a tube amp? Hearing larger more efficient Klipsch's on a low powered single ended triode amp is a life changing experience. Wear some diapers, you may need it...You will be blown away by it...but tubes are not for everyone, some people don't like the idea of having to change them, but to me there is nothing that comes close...
The Tim Rawson gainclone amps are also incredible sounding "giantkiller" amps that can be had very inexpensively. They will also take your breath away. Couple the gainclone with a tube preamp and sonically its killer...
Rega makes great cd players (as well at TT's) and you can find a used Planet in the $3-400 price range and up for more modern versions. The Naim cd3.5 is an outstanding cd player as well and can be had in the $7-800 range or less. I never owned an outboard DAC so I can't comment on what Klipschfan said, but that sounds like an interesting concept as well if you want to get into ipod and computer based music.
As for me, I know that I prefer the sound of tubes to anything else. A solid state amp, or gainclone with a tube preamp is also a great way to go...
So if it were me and to narrow it down, I'd spend maybe $1000-1500 on a gainclone and tube preamp or tube integrated amp including interconnects/spkr wire, another $1K on a cd player, $500-750 on a TT, and $1500-2K on speakers...but realistically, I could be very happy with much less...
Specifically, I'd go with a Naim cd3.5 w/flatcap pwr supply, nice analog tuner, Nakamichi cassette, low powered SET amp w/hi efficiency speakers or gainclone/SS amp/tube preamp combo and monitor speakers.
Many people believe to start with the spkrs and build around that but the maker of Linn TT's believed to get the best source components possible (cd, tt, tuner, etc) because if you have great speakers, great amps and junky sources, the junk only gets amplified downstream. This makes more sense to me...
So let us kmow a little more about your listening habits and at what volumes you listen at. We can then go from there. A little thought about these concepts makes the infinite component choices much easier to make. Good luck,
Lou
