Odyssey Stratos, McCormack DNA 225 or Bryston4BST?

Thanks to all of you for the great insight and opinions. To Vladamir, since I'm not a 'techie' but rather just like great sounding music, does the following suffice for the AR SP16L to drive the Stratos?

OUTPUT IMPEDANCE: 260 ohms Single Ended main; 20K ohms minimum load and 1000 pF maximum capacitance. Outputs (3): 2 main, 1 record (Single Ended RCA connectors).

just call klaus-even if you buy a used unit he will answer your questions-

best time is after 6pm eastern time

Even if AR recommends 20K ohms as a minimum amplifier load (Stratos is 10K), the SP16's 260 ohms seems just about low enough (the old rule of thumb is to multiply it by 50), but it is good advice to call Klaus as Polara says, he's very helpful.

Hafler on a short audiophile list - hmmmm. I have a Hafler 9505 that will drive about anything. It runs a little hot with the factory bias setup - but sure is a good amp. Also, have a Hafler XL280 for the wife's system - another really fine sounding amp at 145 wpc. I know there are a lot of purist that cringe at Hafler - but the truth is in the listening. I see the 9505 $2200.00 list (1500.00 street) going for 650.00 bucks on Ebay and occasionally less - quite a deal I think. Also have a Bryton 4B which will cost a little more on the used market. I think the 9505 is as good. IMHO

Definately go with the Stratos if this is the only choice of the two. But if push comes to shove, & the choice was between the Stratos or the "Deluxe" DNA 0.5, I will pick the Deluxe DNA 0.5.