try this ( multiple CSS changes )

#logoWrapper {
background-color:#FFFFFF;
background-image:url(../images/title_banner.gif);
background-position:center center;
background-repeat:no-repeat;
font-weight:bold;
height:142px;
}

Change height from 142px to 132px .

#navMain ul, #navSupp ul, #navCatTabs ul {
line-height:1.5em;
list-style-type:none;
margin:0;
padding:3.5em 0;
text-align:center;
}

change padding from 3.5em to 2.8em

#navMainSearch {
float:right;
padding:2.5em 1em;

padding here change from 2.5em to 2em .

you can play with those values to suite your needs.
}