Bills has a dyno up for the RM- more top end and over rev, with no loss of bottom- not a track report.
i have heard that the PC pipe traded bottom for top- steve tried it also.
as for the reeds, i am using the complete setup from a stock yz250 (with the spacer plate) made it crisper from the bottom up. I would be tempted to try the Radvalve since it appears that the stock setup holds it back a bit.
as for the v-force, steve tried that also.
What am i really saying??? ive tried none oof these parts, but i think you should buy them all and let us know how they work out!:)