[Elecraft] filters

[Dan Copeland]

I am getting ready to order a K3. I am having trouble
Deciding which filters to order. I want to listen to the
SW bands so am ordering the General coverage module. I
Want either the 6 or the 13kc filters but not both. I
Know if I order the 6 it will not work for FM but if I
Order the 13 will be happy with it on am?

Is there much advantage to getting the 2.8  8 pole
Verses the 2.7 5 pole? Same with the 400hz 8 pole 
Vs the 500hz 5 pole.

Thanks for your help

Dan N0DT