Hi James.
Listened to your first preview. My immediate thought was "Oh, no. Not another one of these".
There are just so many pairs of people out there doing this same thing at the moment. Whilst you're not bad, there's nothing in there that sets you aside from the rest. It seems to me you've just thrown your hats into a very over-populated ring.
As Fred says, stay confident. One of these many duos will make good - and it may be you two.