This is tough. Ride the Lightning is my favorite out of the whole batch. But while I consider Powerslave to be the second weakest of the "classic" Maiden albums, I'll take the three good songs (Two Minutes, the title song, and Rime). The Warning isn't bad either, although probably the weakest "classic" Queensryche album. So I guess I'll take group #2. And assuming I am stuck with these on a desert island, I can always use the Rush album for kindling, so group 2 is a win.