[Elecraft] Auto Bandpass Filter

[Brett Howard]

Ok so I'm looking for an auto band pass filter to use with the K3...
Would be slick if the filter could be interfaced directly to the K3 but
I'm planning on needing a band decoder/smart switch for different
widgets later in life that I've been planning on starting so this may be
the opportunity for that project to need to start.

Anyway I've been trying to find all my options and some pros/cons of the
different solutions from people who have experience with them.  These
are the units I've found...  Please let me know if you have experience
with these such as ease of interfacing, build quality, power handling,
longevity, loss, out of band attenuation and what not.

Array Solutions FilterMAX II: 
http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of%
20page

Array Solutions Filter Master (FM-6):
http://www.arraysolutions.com/Products/wx0bbpf6.htm

I.C.E. 419B
http://www.iceradioproducts.com/filtersrf.html#3

DuneStar Model 600: