I use the Audio-Technica PRO-88W Wireless System with the Audio-Technica AUCP8306 CP8306 Adapter Cable for Pro 88 W Wireless System XLR conversion cable. I also use the Audio-Technica AT897 - Shotgun Microphone. These mic's wasn't as expensive as others I had researched, but really produces a great sound. :D Of course ensure that you purchase a wind-screen for the shot-gun mic if you plan to shoot outside. (!)
Good Luck!!!