The elastic hem doesn't bother me - mine bunch too (cept for my primal wear jerseys) but I just look at it as way to change my arms - gives me a chance to sit up and pull the jersey back down. I've never worn anything else but that doesn't mean I wouldn't try!
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"