This thread is ridiculous! OP... I have been using a 2010 Mac mini as a HTPC for two years, on a daily basis. My roommate uses it daily, too. I've also used it for video editing in Adobe Premier. There will be NO problems using it with stock hardware. Like someone else mentioned, re-install 10.6 Snow Leopard and it will run fine with the 2GB of RAM. I used it like that until I needed to borrow it for video editing, then I upgraded to 8GB and Mountain Lion.
Seriously, don't waste your time and money (and potentially destroying your Mac mini) by trying to add all of this unnecessary hardware.