Naim or Jeff Rowland?

Miami, if you want to familiarize yourself with the Rowland Concerto integrated, the Rowland online Knowledge Base has an entry with links to Concerto specifications, User Manual, and photos:

http://jeffrowlandgroup.com/kb/questions.php?questionid=589

One interesting feature of the 250W Concerto appears to be that it can be used as a full integrated amp as well as just as a linestage/preamplifier, because it has also two preamplified outputs for used with a user-supplied amp... You will find all of this described in the manual.

Note that unlike its Continuum 250 successor, the Concerto integrated is not listed as compatible with the external Rowland PC-1 rectifier, which is based on an active power factor conversion module.

Rowland and Naim sound very different from each other. I've owned components from both brands. I think Naim is very overrated and too expensive for what they give you. In my opinion, the Rowland would be a much better choice given your speakers. It's better equipped to deal with the tweeters on the 805's. I know first hand. The same tweeters with in my 802's.

Miami, note that there are two identically-looking Rowland products called Concerto... There is the Concerto integrated, and then there is the Concerto preamplifier. The latter lacks the amplification section. Make sure you have been offered the full Concerto Integrated, and that its original remote control is included in the package.

G.