http://www.amazon.co...23729175&sr=1-1
and
http://www.amazon.co...uters_ai_ps_t_8
Would last you years and far faster then what you currently have!
(Oh, and forget the whole Ghz thing, its how its built not its Ghz which makes it fast. You could overclock a pentium 4 to 5ghz and it would still be slower then a dual core I3 at 3ghz)