It cost me about $300, but I moved from my aging Socket A platform (Athlon XP 1800+, FSB 133, 1GB PC2700) to a Socket 754 platform (Sempron 2800+ 64-bit, HT 800, 1GB PC3200).
That easily cut my load times to 1/4th of what they are. After months of playing it finally became unbearble to wait up to a minute and a half for SH3 to load. Obviously, that make testing stuff for ImprovedConvoys nearly impossible.
Now, I'm finally back in business, I hope.