You just gotta ask yourself, why am I putting a splash page on the site in the first place?
A lot of people add splash sites when dealing with sites that use Flash. Having a Flash splash page allows you to give the customer some animation to look at while the rest of the content on the page loads.
Some people will add a splash page for branding, but your splash page isn't really offering much more branding than your site already offers.
And others will add a splash page to offer different ways of viewing the page; Click this Link for Firefox Users, This link for IE Users, links for resolution, and so on. But these aren't items you need to worry about where you are at.
What the splash page definently does though, is makes your user click one more time to see your product or get to your store. You want them to go in, find what they're looking for, buy, and leave ready to come back for more. The more clicks that it takes the higher chances of your customer leaving your site out of frustration and/or impatience.
Also as stated previously, losing your splash page will help your Search Engine rankings.