late again... things do happen fast here!
I love the Baby Bottle, I also have a Dragonfly and need to get a second one. There are quite a few other Blue microphones I have used, and would not hesitate to buy when the time is right.
No one mentioned the Shure KSM family, the KSM-32 would have been an interesting alternative. It is a very neutral microphone, especially compared the the Baby Bottle, but sometimes that's a good place to start too.
With respect to Mike's comments - I think he has described the marketplace well. In the sub $1000 market (number purely a demarcation, I'm not sure exactly where it falls) there are a lot of not-so-great microphones, unfortunately. Some sound bad the day you buy them, some age poorly. But there are exceptions to the rule, the thing is you need to find a way to audition them to at least rule out the first group, and then you need folks you trust to rule out the second<G>!
My LDC collection is modest, and it was built over quite a few years, and most of them were purchased used. The thing about used microphones is they are a gamble if you do not know their history. AND, sadly, good microphones hold their value - you are not going to get a $1500 microphone for $500 on the used market unless you get very lucky. BUT, a $1500 microphone that you buy for $1000 has probably been well cared for, and will last as long as you choose.
One company that flies under the radar is Michael Joly. He makes his own microphones, but he also modifies inexpensive microphones, sometimes to the extent of replacing even the capsule. His MJE-384K is at the top of my list. He provides WAV file demos, which I find quite useful. I've seen what he does to the Oktava microphones he modifies, and he offers return privileges.
You can't go wrong with the Baby Bottle, I know you are going to have a lot of fun with it... so go make some music now!