I agree with most comments....
Second one. Hands down.
Brighter, simpler, WAY more legible.
The first is SO dark, I am wondering if there would be some brightening on hover to illuminate spot areas. Even so, it is TOO dark. Even the top dek (the tagline blurb) on the first box is a bit too dark... and it is the brightest item in the body below the nav area. By the time a reader gets to the bottom the text is barely readable at all.
I am guessing the ancillary nav on left is for sub-menus within each main nav items above, but not really sure. If so, the type should match above, and not be "something else". Less is always more. Avoid too many fonts, avoid too many colors, and avoid visual clutter wherever possible. Great sites are almost always deceptively simple in their approach (Apple's own website is a good example, Microsoft is not... although it has gotten better).
Too many fonts. Hate to be boring... but "Student" type & "Menu" types are different (and not web-safe I wager). Also, the second box body copy is smaller than the top one. Little inconsistencies like that are the mark of an inexperienced designer (that is NOT a dig at you at all). There is NOTHING wrong with having little or no experience... you just DON'T want it show, lol.
Also, there is a typo on footer... "COPYTIGHT".
Kill the graphic. Weird splotches, swirly things, etc. may be ALL over iStock & elsewhere, but as soon as they hit the mainstream they are dead as far as looking hip & cutting edge. Death to swirlys!
The second one has "zing", and it is provided by the brightness of the content against the subdued background palette over little gimmicks like swirls and type variations. I used to have an exercise for young designers/interns... I told them to type a paragraph. Each letter was to be a different font. Each letter was to be different color. "Done..", I told them, it was "out" of their system, and they could forever more resist the call to add unnecessary complexity & clutter to their work. Just because you can, doesn't mean you should...
Smashing Magazine is a good online resource with lots of inspiration and technical advice as well. If you want an excellent (and better yet SHORT) book as an interface resource I would strongly recommend Steve Krug's "Don't Make me Think" on web usability.
Back to the "Menu" part... since that is what you were actually stuck on...
if the area is indeed a sub-nav, why don't you use drop-downs from the main nav, OR add a breadcrumb Nav directly below the the nav-tabs...
There is nothing wrong with pushing the boundaries, you just want it to be functional as well as cool. Check out
http://for-screen.com/, Tobias Vogel has got quite a gift for pushing the boundaries of interface design. He routinely completely redesigns his website top to bottom... and one never knows what one will find. His interfaces sometimes are like a little puzzle, but at the same time easy enough to figure out without undue frustration.
All in all though you have made a good start. Really. Best of luck in your travels through life. michael