That model isn't bad. It's not great but its basically a Thermaltake toughpower model. That model seems to be made by Channel Well Technology who generally put out good PSU's. That being said, if you wanted to go with a better quality model, there are a lot of good options out there. Since you're using a LC-Power model, I'm guessing you're in Europe somewhere? The models in the US that a lot of people quote may be harder to find depending on your market.
Take a look at this list here
www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html
This is a good starting place to look for models that may be in your budget. You don't NEED a super expensive model, although thats always nice to have. A 550w would give you plenty of power, just make sure its a good model. Like the previous poster said, the G2 series from EVGA are very good. Depending on the day, they can be cheaper than the GS or GQ models which are only slightly below them in quality. There are also many good options from Seasonic and XFX as well, but without knowing which market you're in its hard to give specific recommendations.