Tyan Thunder S2462 + Zalman CNPS-7000B or SI-97 = will it fit?

[okayfine]

I'm currently watercooling my dual S2462's now but I may have to move to a aircooled setup in a rackmounted enclosure, so I need to look for 2 Socket A heatsinks.

Does anyone know if the two Zalman 7000 series HSF's will fit? What about Thermalright SI-97 ? Any other suggestions for a quiet system?

Thanks in advance.