Integrated amp for B&W 805S under $1200?

Raise your budget a bit more & look for a Symphonic Line Integrated in the used market. New is very expensive. This should be 'end of the road'.

With 800-series, just as a fellow member said, you skimp on the amp, you'll never reach your goals. Most B&W 800-series owners complain but seriously they never went all the way!

Tony of course sells Bryston and NAD which was not disclosed.

Again.

Pick up a used Marantz PM15S1 for about 1250 dollars. I do not agree with (Bob_reynolds) comment about the 805 not doing bass- probably his experience has been with less than good amplification. I have owned both the original 805 and the 805s- both are excellent bass reproducers provided you power them right. I have used the Krell 400xi with VERY good results. Right now I have the PM11S1 integrated (approx $2200 used) and having also owned the PM15S1 I feel that at your price point the 15s1 will be sufficient. Besides you get great build quality, remote convenience with the 15s1.

I have listened to, but not owned the 805s. Also, I don't listen to a lot of classical music. That being said I have owned numerous integrated amps including the CAP-151. For the used price there are better sounding amps.
My recommendation is you look into a used Bel Canto eVo2i. I currently use one and don't see how I can better its' sound without spending more money than I'm willing to. It runs cool and quiet and is more eco friendly than most amps. review.
Another recommendation for sound quality is the Portal Panache. Mine had a very warm and inviting sound with the only downside being no remote. Or if you liked the YBA sound maybe you should look at the YBA Integre line. Good luck with your search.

I have heard the 805S' driven with a mcintosh 6900 integrated, Rotel separates, and a 100w Yamaha reciever (yes, I said it, "receiver"). The 805 got about as loud as you would want to go on a bookshelf (about 90 db peaks on Von Karajan's Eroica from 1963 on DG (CD), driven by the reciever, and I heard no distortion. Out of the bunch, the mcintosh sounded the best, but my second choice would not be the Rotels. Bryston makes a nice 100 watt integrated also, which you may be able to find for around 1200 not new but I only heard it driving Dali's and Dynaudio consumers and have a sneaky suscpicion that it may be a little harsh for the B&W's, particularly with classical music. For my ears ( and other than an occasional nostalgic listen to the Stones or Janis I listen to classical 99.5 hours out of 100) the 805 sounded very nice without a sub, to get down low you will need a sub anyway. Only relatively few works will leave you somewhat lacking - heavy bass such as Mahler's 9th for example - you can get to ok levels say 90 db peaks with the 805 and to do so won't actually take more than 50 watts in a normal room of say 8 ft. ceilings and 12 by 20 positioned about 6 feet away. As far as musical, the 805S is really hard to beat - for anything other than concert levels for big bass heavy works, I do not think I heard any speaker sound better than the 805S - and that includes the 802D, Focal's beryllium tweeter floorstander listed at around 10k, Dali's Helicon 4 Mk II, and the magnepan 3.6.