I am thinking of buying the Avalon Osiris.

Make sure you've got enough equity in your home for the mortgage?

I have heard this speaker,and honestly,it is a CLASSIC.You won't do better,even in todays overpopulated market.One thing,you must have a good sized room,and good amplification.If the speakers are in good shape,and the price is right(list was 72 thousand U.S. dollars),you will be thrilled!!I do have Avalons,but they are the Ascents,which are also a fabulous design(precursor to the Osiris),and quite honestly cannot see myself upgrading to anything else,so long as I am in my current mid sized room.Even these speakers were still WAY ahead of their time,and easy to drive,like the Osiris!!Also,both the Osiris and Ascent mk2,used very good metal dome technology(two modified titanium tweeters and an aluminum/magnesium mid driver on the Osiris.These drivers,regardless of industry hype,are INCREDIBLY revealing,yet to my ear,are extremely good at getting timbres correct.Resolution is,also,exemplary!They will ruthlessly reveal any upstream problems.This can be wonderful,if you have a carefully voiced system,yet is a nightmare,if you don't give it really good ancillary stuff.

Best to you,and keep me posted.

Looking at the rest of his system I think he does.
If I where you I would also invest in a rack.

BTW-I took a look at your equipment list.I begin to wonder if you are a collector or dealer.If you are a collector,I really love your stuff.You definitely have the ancillaries to drive the Osiris.If a dealer,you have some great stuff,that unfortunately,you won't experience much.

One thing,pertaining to room acoustics,is PLEASE make sure to give CLOSE attention,if you go for the Osiris.Your room seems a bit under treated,though I have not seen the entire room picture.The Osiris MUST have a very carefully treated room,and this is how I have heard them.Based on this parameter,you should be the envy of a ton of hobbyists.Including me.

Best regards.

Tall ceiling, large room, high current amps with stiff power supplies. The speakers were designed with MIT cables in mind. See Jonathan Scull's write-up in the Feb 1996 Stereophile, page 41.