well it sounds like I need to give the little P51 a listen, I really loved my pico when I had it; I only sold it on a couple of weeks ago in favour of the D10, but i'm not regretting the decision as the D10 provides a lot the pico cant and even as amp only the D10 provides at least the enjoyment the pico did. I may just pick up a mustang used, to see what all the fuss is about. I never liked the RSA portables before (only heard hornet M, Predator, tomahawk, (SR71 this was nice, but I hadnt heard many portables when I heard this) as i'm not a big fan of the euphonic warm sound, especially in amps and thats one thing that all the ones I have heard have in common (bar the original SR71, but only had a brief listen of a friends); thats also one reason why it has to be a pretty special tube amp for me to like it too.