Hey dude

Well Behringer is not the best in the world however it is very cheap.

How are you planning to record? Running a stereo line out of the mixer into a sound card or the laptop ? To do this you will want some sort of audio software however if you are only recording stereo, you should be able to download something to sort you out. Their are plenty of posts on this subject in this section of the Gt forum.

The most critical thing you are going to face is mic choice and placement.

You might want to consider using a pair of small diaphragm condensers set up as a stereo pair. Their are many ways and positions for stereo pairs of mics (ie. OTRF or X-Y) however you will have to experiment with what works best for you.

Here is a link to some stereo miking info:

http://www.prosoundweb.com/studyhall/shure/mics/stereo/techniques.php

All that said you may want to use a stereo channel strip (ART make a really good one check out the TPS / DPS systems) rather than a mixer, you may well end up getting more bang for your buck. You could save even more money by going second hand !

What microphones are you planning on using ?

http://www.dolphinmusic.co.uk/page/shop/flypage/product_id/6711

I have three of the AKG c1000s in my mic locker and I have not been disappointed.
http://www.dolphinmusic.co.uk/page/shop/flypage/product_id/1503

I have used then individually on piano, Backing vox and various drums. Im not sure how well they'd do for critical vox however for the price they are excellent. Rode (NT1a and NT2as) and studio projects make some really good cheaper mics also !