This is what I use for my gig bag.
http://www.music123.com/Shure-MRB-Record-Bag-i73505.music
There is enough room inside for my cables, effect pedals, extra mics
and of course my harp box.
I love it because I can sling it on my shoulder or use it as a back
pack. I have everything I need to play a gig except and amp. Yes, I
have more RP400 in there just in case I can't bring an amp.
And of course if there is a fire and I had time to grab one thing...
my valuable are ready to go at a moments notice.
What are you guys using?