Okay... this is assuming you want to keep this as a 2-track project, if multitrack is what you desire there are other options available that I will not be getting into here.
for official release from venues that large I think your best bet would be some sort of mic/sbd mix. Ifyou're playing places that big you should be able to run a lineout of the board and get a straight board feed that sounds good. You could run two track out of the board into an Apogee MiniMe into a laptop at 24/48. Ideally you could add a pair of stereo mics at the mix position. I'd look into a stereo mic of some sort... the akg 426 or, ideally, the soundfield st-250. This would allow you to dial in the mic to each different room on every night very precisely while keeping setup simple and short. For a stereo pair I'd look into the schoeps cmc6/mk41's; akg483's; or the Microtech Gefell m210's. I think for general ease of use night in and night out I'd go with one of the stereo mics. All mics listed are of very high sonic quality.
otherwise if you want strictly mics your best bet is to run either
1. in the sweet spot which is probably going to be just in front of the FOH mix position. unfortunately this puts you out into the crowd and takes up space and can potentially disturb the patrons seated around you.
2. you can run mics from the FOH mix position... this would be simpler but the ratio of direct to reverberant sound is worse than from in front of the board and as such your results may vary.
for either of those two choices I would look into the grace designs 101 preamp (or any of the other grace products) and an apogee minime a/d converter (or any of the other apogee converters). The Grace Designs Lunatec V3 is an all in one solution that may interest you as well. As for mics I think you would be safe with any of the above listed microphones.
Just some ideas...
www.gracedesign.comwww.apogeedigital.com