Hello..
Not a profesional like some of the guys on here so can only comment from a user point of view.
without trying to sound too negative i believe you should take out the effect on the rollovers(on the index page). it really is off putting. also maybe think about positioning the page in the centre so those on higher res dont have too much white space on the right side of the screen.
Maybe also you could change or alter the logo as for me sharper images do give more of a professional look.
But other than that its all there and works for me, so other than just tidying it up and making it as user friendly as possible its a good job..
congrats on getting in the se top spots.
just keep at it. Good luck