I bought the CRYORIG H7 for my 4790K and I love it. It keeps it nice and cool even at 4.6GHz. Mounting was easy too. Nice clean look. It's not that loud, but has a low hum to it at high rpm. Fit nicely in my mini-ATX tower and microATX mobo. Tight fit, but it did fit.
The Hyper 212X looks pretty good, but it shows to be louder than the H7. The H7 comes with mounting brackets for a second fan also. Not sure if two CPU fans would fit in the Dell Inspiron 530's mini-tower case unless you removed the exhaust fan.
He's not trying to put it in the Dell. That was going to be his donor tower for the stock cooler until we shot that idea down. Good job bringing up all possible issues though, it helps OP know what he's getting into.
The reason I brought up the 212X is the stocking issue with the H7. If the H7 goes out of stock again, OP would need a back-up plan.