Sennheiser makes great mics and the best RF systems out there. The real question is if you need a shotgun over a cardioid or an omni. Do some homework on microphone polar patterns and practical applications and see if you want a shotgun mic.
A good analogy for polar patterns of mics is firearms. Do you want to be a sniper, a close range handgun, or a sawed off shotgun. (ironic that in this case "shotgun" means the opposite of the audio term)