To be honest Devon, I reckon you could possibly do a bit more work on that burst and really make it stand out. Just like in your nebular pic, the colours fade into one another seamlessly. I reckon to really achieve your "burst" you could maybe push the purple on the outside edge of the body a bit further into the centre (see pic).
Just a thought man but it just looks a little blotchy and unfinished, take it or leave it.
Nice colour choice btw, love it!