A few perguntas regarding animê and Blu-Ray...

I've seen one on Blu-ray after seeing it on DVD an honestly I ddin't really see much of a difference. With animê i dont see how they could make it anymore clear than it was intended (the newer ones anyway) i have the Trigun & Bebop filmes on DVD. I was tempted to re-buy on blu-ray till i saw here wasnt much of a difference between the two so DVD is good enough for me. The only one i would consider is Akira, being that its an older anime, the quality of Blu-ray may improve on its no geral, global appearance an clarity somewhat better than on DVD.
well thats my thought on it anyway, hope i could be of some help to you :)

Sorta. You can tell little difference but I still recommend Blu-Ray.

Actually, Yes, I do own Blu-Ray animê DVD's. I own Black Butler Season 2 on Blu-Ray ~

I would DEFINETLY recommend Sekirei, and Rin: Daughters of Mnemosyne.

OUt of your potions those are the ownly two I've seen. But they're really worth buying ~