Thank you for the reply, and I agree about not skimping on the PSU. I took a look at the Prime PX and for $20 more I might be tempted however I am not sure how much more efficient it will be esp at lower loads. Sadly no deals at the moment and the Prime PX isn't available for the next 2 weeks.
In the process of building a new PC and debating which PSU to put in. Looking for quiet and stable PSU, I narrowed it down to the following:
Seasonic focus PX: Good reviews, good efficiency, relative quiet, has smaller fan which might be more noisy, less quality components than prime GX...