Really nice
6/4 - always feels a bit jazzy. I know you said you used samples - but are any parts of this your own or is it all an arrangement of exisiting samples? - The ending was a little weak - it seemed like the song just faded out in the middle. I think that you could improve this alot by adding a bridge to change things up a little and maybe giving it an actual ending in place of the fade-out. Overall it was really nice to listen to - Also for fun, try stripping out the existing beat and replacing it with something a little more agressive - D&B or something - it would give the piece a really cool feel - smooth loungy keys and horns on top of a really hard beat - just an idea.
This was good - explore this style a bit more!
I hope this helped - I'm not meaning to rip up your stuff. I'm voting 4 on this one, it's very good but I think that it's still missing the extra-something that would push the score up to a 5.