Need professional advise

I have a pair of McIntosh ML1C speakers. The 12" and 8" woofer foam is now rotted out. I was thinking of replacing them with these parts:

http://www.parts-express.com/pe/pshowdetl.cfm?&Partnumber=295-444

http://www.parts-express.com/pe/pshowdetl.cfm?&Partnumber=295-366

Would this be a huge mistake? I need some advise on this - I think it would work fine and result in some pretty good sound.