I can get my fx 4100 overclocked to 4.2ghz on stock voltage of 1.3625 and i have got it to 4.6ghz with 1.5v is the 4.2ghz a good overclock and would it be worth $150-$200 to upgrade to a fx 6350 or fx $8350? temps for 4.6ghz are 40c idle and max 50c and temps for 4.2ghz are 30c idle and max 45c what should i do?