Have a 30gig 4 channel Pelco running at my fathers shop for 4 years now. This setup will loop in a week with medium frame rate.
4 channels in w/monitor out, painless setup nd dead nuts reliable. It just works.
Better selection available these days.

edit.. 30 gig like this one.
http://www.sourcesecurity.com/techni...x1004-060.html