I rode a 20" and moved to a 26" and rode that for a couple of months while still having my 20" in the garage because I had the money at the time, anyways I seemed to keep going back on my 20" because I felt like the 26" was a little too big for me and now I still have the 20" and the 26" in the garage and its so hard to choose when you have both of the bikes so if your going to make a move make sure you get rid of one bike then get the other if thats what you want to do but its your choice if you want to move or not but I would consider getting rid of the bike and move, try not to keep both bikes cause thats when it makes the problem even worst.
Just from my point of view, others might think differently.
Andy.B