Me and my son are going to get a new amp and we have narrowed it down to Roland cube 60 or the AD50VT. Were beginners and have a traynor 10w amp now that the distortion sounds just awful !! My question is the 10w amp we have now is lots loud enough for us,we don't go over 4 on it So would we be better off going with the smaller version of those amps AD15VT or cube 15.Would we be missing something other than the power. We like playing the metallica and ACDC stuff, thanks alot