Everything is too big, and a lot of the screen is just wasted space, you need to shrink down your graphic headers. You could decrease the text font size by 1 or 2. The table at right is a bit unprofessional.
Yes, the text and header are a little large. Reduce the size of the text a bit, and like the others said, the table to the right is very "newbie". Borders on tables don't have a very professional appearance. The subscribe buttons are very old looking as well. Why not have buttons like your nav? Also, the center justification in the center doesn't look right. Your header and nav are left justified, putting weight to the left side, the text should be left justified as well. I would also suggest pre-loading your rollovers so they don't have to load every time you go over them.