Best 2.0 Khz filter for FT-990 ?

[Richard Harel]

     I'd like to add a 2 Khz IF filter to my FT-990. Any comments on which 
     filter is best ? (Fox Tango, Yaesu, Collins ??)
     
     Any feedback would be appreciated.
     
     73,
     Rich
     WB2JBS/4X1DA