Well...
I read an anandtech report recently that placed it ahead of rambus in almost everything, and ahead of Sdram in everything. The major advantage is easing the bottleneck. If the processor can operate at 1ghz, and the memory is stuck at 133, the the processor must continuously wait out clock cycles while the data it needs is retrieved ever so slowly. If you are using pc2100 ddr and the right Tbird chip (266 front side) and you spend some time tweaking the board and getting everything the way it works best with your stuff, you will find an advantage over ANY Pentium 3 system of equal cost. 10% is certainly in range. And if you think about it, how much would even 6% of an advantage be when its 6% increase in performance over a 1.3 ghz processor? That can be decently significant, enough for a few extra tracks maybe, or some extra plug ins. With our resource hungry applications, we want and need all we can get. Plus, the DDR system ends up costing the same as a Pentium system, give or take $20. Why NOT go DDR?
My money quote is correct, by the way... I've spent hours and hours jamming this part with that, trying to find the cheapest way to get the best performance. I truly believe its worth it. Whats $20 or so? I think you can even end up cheaper than a PIII sdram setup if you try hard enough. Very very possible. Again, 256mb of DDR can be had for $110. Thats pretty good, and not too pricey at all, considering the price of SDRAM about 2 years ago, or less. All I can say is, I think its worth it, and I think its silly not to go ahead and jump. If not, you'll be wishing you did a year from now. Opinions will vary, of course, but I hope whatever you get works out great.
Peace,
Paul