Correct I do NOT recommend getting one then. Your fine on your hardware, and can potentially OVERCLOCK parts (do some research and be CAREFUL) to tweak it out more during gameplay/streaming. The ONLY issues left you need to consider is
1) What Internet Service Package you have (you need at least a Cable Internet package usually one that your OUT -NOT IN- is 5Mbps MINIMUM).
2) If you have ALOT of devices over your network (Bob's iPhone, Xbox, laptop PLUS Sally's Razer, laptop and Kindle, PLUS Mom's Laptop and iPhone, PLUS Dad's BluRay, DVR, Laptop, Android Tablet, iPhone, and Work phone) you will need to establish some Quality of Service (QoS) on all the devices and the router, then set the QoS table to put your stuff at higher priority (which may mean you interfere with Mom watching Sons of Anarchy on Netflix on her iPhone as she walks around the house).
Just something to consider.