What's the greatest bargain in SET these days?

Charles the gentleman owns Coincident speakers, I'm not sure which model but that might help put things in perspective. Of course this is second hand hearsay testimony but I would add from a very reliable and trustworthy source.

Tubegroover,
If you're interested in SET amplifiers with more power than a 300b provides, the LM 518ia and Coincident Turbo 845 are serious built and executed choices. Yes they're heavy beasts and for good reason, major power supply and transformers to properly handle the demands of the high voltage 845 tube. I'd really relish the opportunity to hear these two A/B directly. I suspect that they are both truly excellent sounding SETs if you need roughly 25 watts of power. Both use the 300b as the driver tube, these are high value amplifiers when you consider the total package they offer.

Correction,
The Line Magnetic 219ia has the 300b driver not the 518ia.

Tim Smith,
If you are still following this thread I have some suggested recordings you may like. On my system page date 10/18/2014 I listed some jazz guitarists CDs (you may have these already).

Four more to consider.
Kenny Burrell, "Bluesy Burrell" and "Midnight Blue".
Wes Montgomery, "Full House" and "Wes Montgomery Trio"
Charles,

Indeed they are high value amplifiers Charles. Unfortunately they are a bit too large and heavy and I would be inclined more towards mono blocks of more managable size if I were to consider an SET. I have an audio buddy with a Mastersound integrated 845 SET with 2 845s per channel, which I've listened to many times. It weighs in the neighborhood of 130 lbs and puts out about 35 watts, a real beast. As I have previously stated, as much as I love the wonderful things that SETs do so well I do note their limitations, at least for me and in the set-ups I've heard. Like Mapman said it would probably take a very large full range efficient system to realize the potential, particularly in the bass but it seems you have the right formula with your speaker choice and amps. Though an SET might work satisfactorly for some in a main system for my musical taste and listening biases, I'm not so certain, at least with the Decapos. I would have to go in a different direction. As it stands now I have no desire or intention to do so but would just love to hear, maybe I would change my mind. As things stand now I am VERY satisfied, but one never knows what turns are in store in the future.