Flew the 500 E today, lot's of fun. I guess the 530 with even more oooomph is even better. But after 10 minutes I realized again how freakin noisy it is inside and there's not much space in the back so anything bigger than on overnight bag, forget about it. Also you'll be able to buy 2 505s for the price of one new 530 I think. Also one really good used 350 B3/B3e or a 407, wich is my personal favourite.
But for a fun hooligan machine that's fast and agile? Go for the 530