Please recommend the best wireless digital system. I play a Parker Classic and use a MESA Heartbreaker Amp.
Shure offers the GLXD system, ULXD system and PGXD system.
Before you make any buying decision, we suggest you read the following educational pieces:
Introduction to Wireless Microphone Systems
Selection and Operation of Wireless Microphone Systems
Finally, do not buy any wireless system until you have tried it with your guitar and your amplifier. Wireless transmission can alter the sound of your set-up, so audition any wireless system you are considering.