Ayre K1xe vs. Simaudio P7, P8

I seriously doubt that you would find the Simaudio preamplifiers to have better sound quality or presentation. Probably the single best "sound quality" deal going right now are used K1xe's here on audiogon as some move up to the new KXR (at nearly $20K). Even a new K1xe (around $10K now), there are very few alternatives which can touch it (and it continues to represent a great value for its level of performance). It is truly a purist design, with very high quality parts, zero feedback circuits. If its ergonomics work for you, you're long term satisfaction will (IMO) be much greater than with the alternatives you name. Don't forget its internal phono-stage option, as it remains a truly "best buy" if you spin vinyl (plus you get to avoid another chassis and set of interconnects).

Don't discount the Sim evolution products lightly. I have the W8 Amp and would not trade it for anything under 20K. The integrates are obviously of the same technology. Best to find a dealer and listen to it instead of listening to opinions here. Sims have a very good pedigree and zero feedback design aswell. The people making these products are fanatic about audio...beleive me, I have met and spoken to a few of them at the Montreal show.
cheers and good listening

I second Arkio
I am very familiar with Sim and find the sound truly first rate.In fact one of the latest reviews of the w-7 suggest that it maybe one of the best amps out there.The Lynx circuitry in the Evolution series is one of the most refined in existence ( more refined than the advanced Renaissance that was in the Moon series).I am sure that the Ayre is very good and it probably comes down to taste and preference, so listening is of paramount importance.Enjoy the hunt Dennis