Live sound and studio work are about as comparable as apples and Volkswagens.
I have tonnes of experience with the AKG C419, the 417 I believe just has a shorter neck? I absolutely
love these mics. They have incredible warm sound without sacrificing transient attack. They reject feedback insanely well (I plugged mine into a wireless kit and literally stood in the middle of the bar
in front of the FOH!), and they are rugged.
Also, because the mic is at the same consistent distance, you can have some real insane antics on stage without sacrificing sound. Moreover, one must learn to play with real dynamics, as opposed to just fading away from the mic.
In a nutshell, you have an excellent mic in the C417 and until you're ready to drop more than $1000 into a better clip-on, I wouldn't bother ever changing from the C417. Rock friggin solid it is.
* I do not work for AKG. I just seriously love this product. *
EDIT: PS,
I don't understand why more big bands don't just deck the soloists out in these and make sure the sound-tech has a cue-sheet? I mean, it looks lame to have a bunch of guys waiting in line to share one mic, which should really be EQ'd differently for each horn (Alto, Tenor, Bari, Tpt, Tbone, Mellophone) and when they all end up blasting into the same 57, the saxes sound great, but then the trumpet sounds thin and the bones sound constipated. And unless the sound-tech can eq the one strip almost instantly with exact accuracy (I use 4-band parametric eqs with full frequency spectrum selectable sweeps and variable Q's, so it would be impossible unless I was a dedicated tech for that one band and had practice).