paintballdaddy

I recently bought the M20d from Amazon and in a few days realized that the screen kept freezing up. After reading all these posts I returned the unit to 123music for a refund (which I am waiting for) Now I am concerned I really love this unit. Where do I buy this unit and get a working one?? above I see that people have bought from musicians friend, sweetwater.... etc. so I am thinking I can't buy from those because I will probably get a unit already returned and I just want a unit that doesn't lock up and is working flawlessly like others have stated..... any help on this? Thanks!