I've considered one of those....or the similar omnidirectional ones that don't crank up....
But since mine isn't broken, I figured I couldn't justify it.
but in your case probably makes sense.
One thought though, not that it will make much difference in probably 99.99999% of the time, but the crank up takes that antenna up higher which might be helpful 0.00001% of the time. Actually now that i think about it, maybe a bit more because it gets up over the AC which could block the shorter one from that direction..... (mine sits right next to the AC)
For me, the main reason to consider one of those non-crank ones....is to eliminate the possibility of driving off with it up.