Okay, so I have about $300 to spend for Christmas this year and I am wanting to get my hands on a PC capable of decent frames on the highest settings in most, but NOT ALL, games. Money is so tight with a family of 10 people during Christmas time and I have been wanting to play my 218 game Steam library FOREVER. A Gateway All-In-One is no way to enjoy a great array of PC games. So should I buy an OEM PC on Ebay and upgrade it with a 750 ti? Should I buy parts and build one?