Good point about monitoring... You'd probably have to go into the delta, and then use the analog outs to monitor (get an RCA to 1/4' jack). That may have latency, however.
The thing about mixers is they're usually used for price per channel, meaning you don't get the best channels. If you're going to get a mixer, a small 4 preamp one will probably cost around 150-200. If you're only recording your voice and a flute, I would suggest getting the DMP3. It's...
I don't, and if I did it wouldn't do it justice. :D
A ton of people on here use them, though, and love them. For $399 it's probably the best deal you'll get until you have enough to get a RME Multiface.
You have a few options for recording a band.
Soundcard with pres - Aardvark Q10, or a STaudio DSP3000.
Mixer with soundcard - Something like an E Series mixer and a Delta 1010.
Yeah, search the mic forum for reviews of the B1 or v67 (I forgot to include it, but the v67 goes for $80-90 I think). Both are great budget mics. You also might want to search in the mic forum for what you should use on a flute (large diaphram or small).
I can't help you with the computer...
I'd say at the minimum pick up an Audiophile ($150ish?), a DMP3 (depending on your haggling skills, from $130-$199), and then (since you're recording flute) either a SP B1 ($80?)ething. Maybe a MXL V67.
When I started I went to guitar center and just got one of their cards with $1000 limit...
If it works for everything you're doing then that sounds like a good soundcard to keep. :)
And I don't know about "CD digital in," but you DO have a digital in with the s/pdif.
Depends on your price range. Instead of spending $2500 to repair your mackie, you should just take a plunge and buy a used Ghost for $3000 (that's what I've heard them quoted at on the board). People have no ends to saying how great these consoles are.
EDIT: It's a big one, though, so I...