Its WELL worth the extra considering you can OC it so it destroys the 9800GTX. My VF900 cools my card at 650mhz very well. I don't want to volt mod so I cant really go much higher but people that do can take this card pretty high.
Side note: Anyone think I can flash my stock PCB 4850 to this BIOS? I like the 675mhz clock cause my card doesn't get that high. I'm thinking its got higher than stock volts.