Hey KFS1972,
I know you probably don't feel like it's an issue now, but what if in the future you decide to start playing gigs.

15 watts won't even get you off stage, and would totally get covered up in a practice session.

As I said I know it's not an issue now, but it is something to think about. If you join a band in the next year playing rhythm, then you would have to get another amp to play gigs.

That is the situation I was in when I first went on the road. I didn't plan it at all, it just so happened I was available to help out a friend. We realized during the first soundcheck that my little practice amp was not going to get the job done.

You may not need the volume all the time, but it's nice to have it if you do. It's your decision to make, but I would go with something with a little more power.

Have a merry Christmas, and a happy new year.