Rawson Amps


Does anyone know the difference between the various Rawson amps and have an opinion on the nicest (Aleph, Aleph J, F-1-2-3, Gainclone). I have a nice sounding 60 wpc Gainclone and I want to try another. Any recomendatios or insights are appreciated.
somec59
Extra action: Nice system that you put together, is your DIY Krell KSA 50 clone considered stolen intellectual property? SInce purchasing the rawson amp, I googled and read up on Nelson Pass I'm tempted to purchase a Nelson Pass Preamp so in my case Rawson's amps has served as free marketing for Nelson Pass.
I imagine a Rawson buiold of a Pass circuit would sound pretty similar to a First Watt version, since I don't get the sense they are hard to make, only hard to create the circuit concept - so it proabably would be a lower cost way of enjoying the fruits Nelson Pass' work. My problem with buying the Rawson gear would be if it were in violation of Nelson's conditions for making the designs available to the DIY community in the first place, very generous in itself, and willingly as long a people don't use his intellectual property for commercial gain. NP is a genius circuit designer and the value of a Pass product and his sharing his "experiments" is of great value to the DIY and design community. If Rawson's clones jeopardize that participation by Nelson Pass that I would not support the Rawson product - it seems to violate the spirit of NP's "gift" to the DIY builders. Does it cost Pass sales of his First Watt products? Proabably not much, but not really the point.
I have both Rawson F 5 mono blacks and a Real FirstWatt F5 from Nelson Pass. The sound very similar in all areas! As to the intellectual property, that is a personal choice that individuals make with the possibility of being held accountable. It would be better to dig your hands in and do your own diy amp with the use of official Nelson Pass boards, avail on there website. Is this what China does? I have had great luck with TR amps and with the cost of parts, he did not make much if anything, but still the question. I have found soldering not so hard thus built a B1 and am working on some chip amps for practice. diypass.com and firstwatt.com. Notice, official Firstwatt buyers got free upgrades last month...