That's my current Power Supply.
Opinion would be greatly appreciated.
This is a good one on sale right now for $59.99 after rebate - http://pcpartpicker.com/part/corsair-power-supply-cx750m
Why do you want to change? The PSU that you have is great.
The one you have is great for the price, and will give you nice headroom for future upgrades if needed.
For only a little bit cheaper at $55, you could go for this one: http://ca.pcpartpicker.com/part/antec-power-supply-hcg620m