looking for upgrade suggestions - 12,000 to spend

I would place a bet on Avalons They're a bit hard to drive but not with Jeff Rowland (a true full range speaker is always hard to drive for what I believe)

i've seen eidelons (used or demos) going for close to $12k. yummy.

Lucky you... Give a listen to B&W 800 too. They sound great!

Hi, Chris. You already have a very fine system that many would envy, so any changes to equipment will be primarily, I suspect, a matter of taste (for example, you might find you like the sound of Burmester products better than Rowland, or prefer tubes to solid state). At the level of your investment, buying more expensive gear may simply prove to be a matter of gilding the lily. My best suggestion is to give further thought to your listening area. Although you have some tube traps, you may, for example, want to try a digital room correction process, such as that offered by the TacT RCS. The listening room / environment is so often overlooked, and improving the acoustics or correcting for room variations can make as much or more difference than buying more expensive gear. With your budget, spend $1000 and hire a good -- read independent and objective -- audio consultant with expertise in room design and get their opinion before you start on the upgrade path. Think of your room as a major component in your system, and invest accordingly. I've sold high-end audio equipment and listened to many fine systems, and my experience tells me that improvements to your room will probably yield benefits that far exceed buying ever-more expensive equipment.

Chris, listen to Sdcampbell, his reply to your question is excellent. Your existing system is so good that your budget of $12k spent on speakers or source components is not sufficient to take your system to a higher level. Sure, some of the speakers you mentioned will be an improvement over the SC-IVs, but the differences are not in keeping with the cost it will take to make the change. Large dollars spent for a small sound improvement. A DSP room EQ will substantially improve your system.

If you decide to go with the TACT or its equivalent, then I would also recommend you upgrade and add the Dunlavy subwoofers. Somewhat paradoxically, the added headroom in the bass pays big benefits throughout the frequency. spectrum.