The Colors-IT 650w Titan appears to be a psu that is only sold in the UK and maybe on the continent. It is not available in the USA. In addition, I could not find any competent technical reviews so I cannot make a valid recommendation.
Perhaps one of our UK members can make a recommendation.
My system currently runs fine on a 450w psu, however I am going to overclock my cpu to 3.8ghz. Then later i'm going to upgrade my graphics card and possibly another hard drive plus better cooling for my cpu which is why i need the extra power.