Hi all,
I can't say enough about this amp stand, with the optional mic boom. 
Also packs nicely.
http://accessories.musiciansfriend.com/product/Musicians-Gear-Deluxe-Tripod-
Amp-Stand-with-PosiLok-Combo-Boom-Arm?sku=431053
And I also agree, that the sound is improved once the amp is off the 
floor.  The highs and lows seem to surround the amp, so to speak. I 
just notice an improved sound, hard to explain.
Best,
Chris Mastakas
In a message dated 1/29/2011 7:51:21 P.M. Eastern Standard Time, 
hvyj@xxxxxxx writes:
    Tom,
    I did this to my RI Princeton Reverb with a set of 14" tilt back legs
    because i like how the tone opens up on the PRRI when it' s tilted
    back. And i don't like carrying around an amp stand.
    Done properly, I think it's a great mod that favorably affects the
    tone of the amp more than one might think.
    Hope this helps.
    JP