Excellent 1st choice SU aka Chris.
Old HK joke here, make sure to load magazines with the rounds pointy ends up front.
Another point to consider with the HK... the front strap checkering can be quite aggressive during prolonged range sessions if you have "office" hands as opposed to "outdoorsman" hands.
Stay safe and shoot straight. clips, magazines... we ALL know whatcha mean but do expect someone to get all semantic nazi on ya.
Kinda envious in a way. Really nice selection, should serve you well over the years.
ETA, I just now saw Flopsweats post.