QUOTE(pvanheuklom @ Aug 5 2010, 04:59 AM)

Thanks, Geoffrey ... was hoping you'd have a chance to chime in, since I've still been going back and forth on this. What you say makes sense. At least initially I'll only be recording flute -- in a closet where room noise will likely be an issue. I might want to add voice for a guided meditation project down the line, but that won't be for awhile ... strictly the flute for now.
I saw one comment on eBay from someone selling their MK-012 due to weak signal strength. Any validity to that, or do you suppose something other than the mic was to blame?
As Jeff G said, if someone was having a problem, it was probably the mic, or it could be their preamp. The MK-012 is supposed to be a very nice mic even before modification by someone like Michael Joly. Post mod, it is nothing short of amazing (I've heard some engineers who compare the modded version to the old Neumann KM84, which you probably won't find anymore for less than $1000 each if you can find them at all).
A signal chain (mic+cable+preamp+audio interface) is only as strong as its weakest link. A cheap preamp will compromise the sound, as will a faulty cable or a cheesy mic. I have a Shure SM57 that I plugged into a preamp on my audio interface and I thought is sounded okay (the SM57 is happier with a decent amount of gain). I had heard people rave about the SM57 in some studio situations, but I just didn't see what all the fuss was about. When I got the FMR Really Nice Preamp and plugged it in to that....wow! What a difference! Cranked up the gain and the mic came to life and sounded amazing. It just needed a bit of "oomph".
Having a decent preamp, be it external or built into your recording chain (mixer, audio interface) is important. Some mixers are famous for their built in preamps (some of the Mackie mixers, for example) as are some of the audio interfaces (RMEs Fireface units leap to mind). But Jeff G is right, recording just flute you can get nice recordings with just a good mic and a clean preamp--nothing fancy. He posted that recording he made of that young lady singing, which he recorded with his KAM mic and his recording units preamp and it sounded great, and that is vocals (which are a touchier thing to record than the flute).
It's all about budget and timing. If you have money and you know that you are going to want to make recording a serious interest, then get the best equipment you can afford. It will only make everything sound better (knowing how to use it is factor as well). If you are on a budget, then do lots of research. I built a studio on a budget, saving up for key pieces of gear and really trying to find the best quality to price ratio that I could. I settled on a couple of preamps and a couple of mics, and that is all I have. But used in combination they would not shame themselves in a world class recording studio.
And of course, at the risk of being redundant (since I've said this in about 3 other threads), the gear is actually secondary to the space you record in. As many wise engineers have said, if your room is a disaster (acoustically), you can have a $10,000 signal chain and the recording will still sound awful. Room treatment is very important, unless you can achieve a "dead" room (like a closet full of clothes) that absorbs all reflections. Then you will have to bring your recording back to life with the correct application of reverb and/or delay, but at least your original signal won't be all muddy.