inspiron 3847 psu upgrade?

Hey. I was thinking about getting the i5 3847 (windows 7 setup), but only if I was able to upgrade the PSU, I did a bit of research but just want to make sure cause i'm not exactly an expert on this. Would this PSU be able to replace the 300w one that comes with the dell?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013

if not, can someone give me advice about what other options there are if possible? Thanks for any help.