Why is this Panaflo $5 more then this Panaflo?

[Pack'nHeat]

Over @ FrozenCPU.com (http://www.frozencpu.com/cgi-bin/frozencpu/scan/se=Fans/se=80mm%20Fans/mp=menu_search.html)

Why does the M1A cost more then the H1A?

Also, do these fan filters (http://www.frozencpu.com/cgi-bin/frozencpu/ffi-05.html) screw on, or just stretch over the grill's screws?

I'm still stumped on a 120mm fan choice. Any input would be appreciated. :)

I'm building a rheobus, and will have 2 120mm fans on one rheo. One on the side and one on top. I probably wont need to run them @ full speed.
I don't know which fan to go with.

120mm Aluminum Fan (http://www.frozencpu.com/cgi-bin/frozencpu/fan-43.html) or this Panaflo (http://www.plycon.com/pana120l.htm). Don't care about looks, just cfm/dBa TRUE ratio.

Thanks for any help. :)

Pac

[jad1097]

I think I would go with the aluminum fan because it is cheaper and pushes more air. Plus it looks better.

[OpK Chowdy]

i agree. BUT if the blades are aluminum that could mean any wires (or fingers) will be damaged significantly more than with plastic blades!

[Pack'nHeat]

fins are plastic