Should I get a new PSU?

[CrossLOPER]

I bought a Rocketfish PSU for my tower several years back. As you know, Rocketfish PSUs are essentially rebranded Huntkey PSUs. These are not of the best quality, but the one I have has been running faithfully since 2009. Should I keep this one for now, or should I go ahead and get this thing: http://www.amazon.com/gp/product/B0029F21LK/ref=ox_sc_act_title_5?ie=UTF8&m=ATVPDKIKX0DER

I don't really have a reason to do so. For about a year now, it has been supporting an i5 2500k and a gtx275 without any noticeable issues.

Suggestions?

[Tellos Athenaios]

Not of the best quality is an understatement, if this is anything to go by: http://www.hardocp.com/article/2008/05/13/getting_best_buy_on_power_supply/5