A pro audio guy once told me that when buying pres you need a solid set of 'workhorse' pres. A set of 4-8 pres that you can always use once your dual channel or single channel pres are all used up. These aren't your 'go to' vocal chain pres, they're clean and simple pres that will be used for things like drum tracking and cab's and such...
If you're really on a budget you can 8 channel's for 150 bucks easy! Look at SMPro audio, Nady, and for a little more Beri. the next level up are the more solid (and I would recommend them for sure) pre's like M Audio's Octane, Focusrite's Octopre LE, the presonus Digimax LT, or the SP828. I've used
the Octopre LE and the Octane in my Delta 1010 and I'd really love to pick up either. Alternately you can get 8 channels of DMP3 for about the same price - but it's not in the same box and you get some great features from some of these 8 channel units. They're more than decent, but not as spectacular as the high range stuff
Moving up you get 4 channels from Sytek or higher still there are the 2000+ dollar range of multi channels like the True systems, John Hardy or grace!
There are so many out there in so many price brackets, but the key is having a bunch of solid, workhorse pres you can always go to. Then start to specialize and get a 'vocal' pre, a pair of 'overhead' pres, a snare, a kick, an acoustic pair...etc. Before you know it you'll have 30 channels of pres and your hunny will wonder if you love her or the studio more...
jacob