I think it is very nice and bright. The only suggestion is to incorporate your logo or have a logo designed and use it in the blank white space to the right of the cables and kill the smaller logo at top that you have inserted.
Not major, but I think that you have a very friendy and clean site design.
I currently am thinking about doing something with the header (the white space)...as for it being too big I do not think it is....when i had it designed i guess i went for the simple yet professional look.
I would lose the Orange and use a softly textured light colored background. I would also tone down the blue background in the News table and add different colors to the other two tables the News table sits next to.
Your plans don't attract attention right off the bat and they should be one of the first things your eyes gravitate toward. You could also use some creative fonts to fill that white area in the header with your company name as well as making it a bit smaller.