Time for an upgrade?

I have been using a Nikon D70 for the past 3.5 years now and have been having a great time with it. I have shot 2 weddings and one to come, it has come with me to Chicago, and Dominican Republic among others. The jump to digital was a great step to take back then and now it looks like it may be time to upgrade my arsenal.

I am debating whether or not I should upgrade or just stick with the D70. The D70 takes great shots and the quality is sufficient for what I have been doing. The main thought is that what I am shooting could be a lot better. With the great improvements in noise reduction at higher ISO settings and of course the bump in mega pixels, I stand to improve my shot quality.

The body I am looking at is the Nikon D300. I figure sticking with Nikon is the smart way to go seeing as I have a flash and pair of lenses already for my D70. Also my older memory cards will work for the new camera too.

All this in mind I need to make up my mind fast as I have a wedding to shoot at the end of September and I would need a good amount of time to get comfortable with a new body.

My problem with a big purchase like this is that I lack to BALLS to pull the trigger...