TH7II-Raid and RDRAM Dilema

I need some advice as to what ram i should pick up for the TH7II-R.

512(2x256) Samsung w/ECC for $100

or

512(2x256) Samsung w/o ECC for $135

I know that with ECC, your overall system is slower by 2-4%. But is it really worth the extra $35 to go over the non-ecc one? Also is there an option in the TH&II-R bios to turn off ECC? That would theoretically make it a non-ECC module if you could right? I also need to get to PC900 (I have a 2.0a C1 that can do 150fsb). Do you think the non-ECC will make it to 900? Thanks for any input for this TH&II noob. Note that i'm buying these used from 2 separate people, hence the reason why the ECC is cheaper.

(TH7II-R owner) [still]

I'm using Samsung "original" (2x256), 45ns, dont know if it's ECC or not, but I do recall an ECC option in the bios.

yea i just went thru the bios and saw that option. Does anyone have any input on which of the two ram i should get?

Im running the original also. I can get 144x4 out of it and max times x3 multiplier i can get is on a 1.6a is 195fsb, In a vapochill. Using a 2.8 now @ 175fsb.