Any HP is a bad decision. Hope nothing happens, because they won't fix it!
There is a reason they consistently score low in customer satisfaction. I spent $500 on an AMD Athlon 1.17GHz computer (so this was some time ago) never booted up, never recieved my money back from HP. After getting the attorney general involved, through some random twist, the retail store agreed to give me my money back, which I felt was WRONG, because it was HP's shoddy product and failure to service it that was the problem.
There was a time when they said "okay we'll replace it", so I shipped it back to them, two months later, another PC that couldn't boot. They told me I must not know how to use it. Problem was I expected this, and initialed the bottom of the PC with a sharpie. Thing is, I didn't even need to check the initial (it was there, however), but my hand print was still in the dust on top of the PC, and it was packed exactly as I had packed it. All they did was turn it around and send it back. When the Attorney General got involved, they had no record of me even sending it to them. (Problem was, I DID have record of me sending it to them, in the form of tracking information, woops!)
Long story short, although the store agreed to give me the money back, HP screwed me over. Don't touch their stuff.
I know that doesn't have much to do with an iMac, but still, Apple's support has always been fantastic, so yes, I would see about selling it and buying an iMac