Well, the speed increase should be quite significant. The problem is, by killing one bottle neck, we may just move the problem elsewhere. (Which is my little worry) But, we have an upgrade path in the future now. So, if it still isn't quick as we would like, when funds allow, we can do further upgrades.
With luck, we can make it all happen tonight. (Chris is off out to buy a new web cam so we can pull faces at each other while we work - essential to help get the job done asap.)
-Russ