I recently bought a GTX 275/285 waterblock from Koolance (VID-NX285N) now I'm planning on buying a GTX 275. The problem is, I don't know which brand to choose from cause I need the videocard with the newest PCB that would fit in the waterblock.

Is there a way to determine if they are new pcb?
These are currently what I can choose from.

Asus
ENGTX275/HTDI/896MD3 $303.81

BFG
BFGEGTX275896OCE $255.99
BFGEGTX275896OCXE $284.99

EVGA
017-P3-1175-AR $358.99
896-P3-1170-AR $269.99

NVIDIA
NV-GTX275 $349.99

MSI
N275GTX-Twin Frozr OC $271.94

PNY
VCGGTX275XPB $264.43

XFX
GX275XAHFF $244.99
GX275XADQC $349.99

Zotac
ZT-275E3KB-FCP $309.99

I would think the NVidia or the Asus would be a safe enough bet.

I've looked at the asus one's board, and of all the pcb on my list that i was able to see, its the closest one compatible. My only worry is the one area mark in red. I have a hunch about the XFX GTX 275 but I'm still unsure cause i havent seen an XFX GTX 275 picture online without its heatsink on.