Take your time and get as much info as possible, I was glad I did!
BTW, the Prodigy Advance has 3A which was another reason I went for it.
As for running multiple locos - modern locos draw less power so this is'nt surprising. But you will see problems trying to run several sound equipped locos. All depends on your plans for the future, but 1.5A is a bit limiting IMHO.
One thing is fo sure, get rid of the Select!