For bigger venues, I usually use my DW Edge or my DW Super Solid.
For midsize gigs, I usually use my Yamaha Elvin Jones, or DW/Craviotto 5.5x13.
For smaller gigs and jams, I like to use my 6.5x14 steel, or my Pearl 4x14 Marvin Smitty Smith sig.
All of my snares sound great and could be used at any gig. They are all versatile enought to hold their own, expecially under the mic, so a lot of times my conventional wisdom goes out the window, and I play whatever I am feeling the most on that particular day. I am getting a bronze 6.5x14 soon and I'm sure that is gonna get heavy play in the rotation!