OK: It looks like I'll be gigging here and there again in a few months' time. I've got everything I need, want and like except for a reliable 2-unit head that has enough power to fill medium rooms with no PA support. My pre-Fender SWR Bass 350 just ain't gonna cut it (pun intended). I need these features in a head: - 2-unit size, mono, and rackmountable size (no more room in my 4U case, and I don't wanna lug around anything bigger) - Speakon output connectors (I'm not a fan of 1/4" plugs moving high current) - 350 to 500 watts @ 4 ohms (my cab is a reasonably efficient 4-ohm 4x10, 800w max) - as clear and warm a tone as possible (I'll be playing mainly blues, pop and rock with a little funk and metal here and there) - Useful tone shaping (not over-the-top, super-duper parametric eq stuff ... I'll end up fiddling with it too much) - As few components as possible made in China (call me an old-school despot, but I've got a theological problem with a communist nation wanting to be a capitalist nation. Decide already!) - NO Ampeg, Trace Elliot, Carvin, Peavey, Hartke, Bear-in-grrr!, Kustom or SWR (Heard 'em & seen 'em, and not what I want.) I'm willing to spend $500-$600, and will likely buy used. I've narrowed my choices down to these: - Eden WT-335/395/405 (with the new simplified eq section and slanted front face) - Genz-Benz GBE600 (would match my G-B cab, but that's trivial) - Gallien-Krueger 700 RB-II (don't want the 700RB; I've heard stories about unreliability) - Yamaha BBT-500H (like the programmable digital-head theory, but how reliable is it?) No longer an option! - Ashdown ABM500 Evo II (electronics made in China, dangit, but assembled in jolly ol' England) - EA iAMP 500 (not sure it's in my price range used, but looks intriguing) - Aguilar AG500 SC (Nice and simple, but are Aggie amps time-tested?)NEW option So, genteel thumpahs ... swami asks for your sage guidance. Which one shall be the chosen one?