hi folks, have been a bit frustrated trying to find a good speaker dock for our 2 iphone 4's on verizon. It has to have a am/fm radio and sound good. We have tried so many that say 'no iphone support' once connected or say it 30-60minutes after you start using it and then it won't charge anymore or work properly. It also needs to be compatible with basic bumper cases. Am i asking too much? What is out there that is good?