I couldn't resist all the praise and idea of a 4 lb power amp any more...I ordered a dcm400l tonight. I think I'll rack it with the SMS like you Jon....then use the FYD with my MC50 or MC2120 if I ever feel the need to cart a 60+ lb power amp out. (Very unlikely) sometimes I've just gone super portable and taken my DRRI out. Then I could always cart the 50lb DSR and use it's pre/power or preout it to one of my power amps...then there's the blues master... I love choices.
At least The 4 lb carvin should be easy to smuggle in the house with out my wife seeing it.
once it's in, she'll never notice that I have a new piece of gear.