Wow, Jay, that's a question that's WIDE OPEN to opinion and speculation.
I guess I could respond in vague and say that the best vocal mic is the one that sounds best on that particular vocalist. But that doesn't really help does it?
I'll give you an example:
I was recording a guitar/vocal demo last weekend. I threw up EVERY vocal mike I have in front of this guy, which consists of:
BLUE Mouse
RCA 77DX
Senheiser MD441
Shure
SM7
MXL V67
TLM 103
SP T3
I even put up an SM57
In the end, I chose the TLM 103 - a mike not necessarily considered to be great for vocals, but on his voice, in this room, under those conditions, it was the best choice.
Point is, there's never going to be ONE mike that'll be the right choice all of the time.
If I had a $1000 in my pocket, and were shopping for vocal mikes, I think I'd buy a few different mikes, rather than just one.
Some obvious choices would be: (assuming you have a decent pre-amp)
Shure SM7 ($399 retail)
Senheiser MD441 ($450 used)
MXL V67 - V67G ($99 retail)
You could get ALL 3 of those for under a grand, and still have money left over for a nice dinner with your sweetie! (Or a new mic stand and pop filter.

)
And the first 2 will likely blow you away on the smoothness and richness of the sound!