Not a bad collection if I do say so my self. However, I'd advise you to use Castlevania 2 as a coaster, or use it to steady a wobbly chair or table, becasue the constant change between day and night may seem like a bit of challenge at first, bit it get's tedious fast, and can piss off the most level headed gamers. Also, the last boss is so easy, that it's not even worth playing through the game to face.
Otherwise, I saw some damn good NES games, which it would be wise to hold onto. You never know, maybe in ten years time, you'll want to play through one, two, or ten of the classics during a bout of nostalgia.