:D rave heaven!
Love the original. You added a bit of nice flair to it, but it has a few flaws that I'm able to point out. One is the bassline- The bass doesn't match the "epic saw" you used for the lead, or the vocals. There is a part where you give the bass and the vocals a part alone- and I almost cried at the poor matching.
Then came the part at 2:24. I cried, this time in big man tears, at the poor matching. My suggestion to fix this would be to tweak with it- there's no need to have all the mids you put into it, a simple multiband filter that excludes a bit of the mids would be perfect- it should remove the obtrusiveness of the bassline. Or you could switch to a square/saw mix oscillator at a higher pitch and try to make it more 'epic'.
The lead was pretty cool, the only thing I can complain about is that it's not grand enough. I love the huge scale you take with this song, though.
In summary, I'm not voting 10 because of a couple of things:
The bassline did not blend with the leads, creating a poor aural experience (for me, at least),
it didn't seem finished- I felt like you could have done MORE,
you got the original artist's name wrong, it's Dave mcCullen, not Dan (proof-http://en.wikipedia.org/wiki/D ave_McCullen)
8/10, 4/5