I think I got it down, at the verge of oscillation I get a really high selectivity. Thanks a lot for the help.
I think the AC analysis for LTspice works fine until you reach the point of oscillation, once you do it gets messy. One funny thing I've noticed is that the plot gives you the maximum value at a specific frequency, regardless of how long it gets there. This means at resonance, the AC plot gives me "26mv", only thing is, it takes around 150 milliseconds to get there, at 17.4KHz, thats a lot of time.
Last thing, what kind of OP AMP should I look for ? What specifications matter most ? Assuming the bandwidth is sufficient, should I be looking at offset voltage ? Voltage noise ? Since this is a feedback circuit, isn't the output noise just as important as input noise ?