my e-ring is almost impossible to match with a band too, so DH and i got matching cartier love rings as wedding bands. mine is the one with diamonds and his is a platinum with the insignia. i never ever take mine off my left hand ring finger, and when i do wear my e-ring nowadays, it goes on my right hand ring finger! i don't think there are any set rules as to how to wear your rings. it should be whatever you are comfortable with! 
