[jitter] 3 x DFG or LFG4 ?

Sorry if this has come up before, I couldn't find it in a search of the archive.

Has anyone tried using 3 dfg boxes to bring 3 video cameras into a Mac Pro? I'm assuming I'll have to add at least 1 PCI Express firewire bus, but want to be sure it'll work before I buy.

http://www.theimagingsource.com/en/products/converters/dfg13941e/overview/

Or would people recommend using Active Silicon's LFG4 instead?
http://www.activesilicon.co.uk/products_fg_lfg.htm