El Dorado - I've used it in APA and AIPA. It's a strong fruity hop - I get melon, pear, peach. It's been described as having 'watermelon Jolly Rancher' type fruitiness and I definitely picked up on some of that. If you like the 'fruit bomb' beers, try a single hop beer to assess it. And it blends well with C hops if you're after a little more balance.
Saphir (Sapphire) - It's a low AA offshoot of Hallertau Mittelfrueh, but with a citrusy, orange/tangerine character to me. It's a nice hop. I used it in a really nice cream ale, but it would work well in a kolsch or pale lager as well.
Haven't used the others, but that's a start !
EDIT - There are some pretty interesting new German hops out there like the others you mention and Mandarina Bavaria and Hull. Need to try them all.