When I upgraded to a new PC my load times went from about 12-14 mins to 'barely time to put the kettle on', as the weeks passed though, and more programs were added it did begin to slow again, but still much better than the previous PC.
Don't forget to ditch StarFarce if you've got an older copy.
Personally I think you'd be better off with my PC, I'll do a straight swap . . .