I have got two 260's with the x factor deck. I think it cuts great at lower heights (3.5 in) especially on 5-7 days of growth on most yards. On most of my yards cutting at 4" to 5" I think that it requires a double cut to eliminate the clump. I have found a 3" wide high lift blade from oregon that cuts extremely well. I demoed a deere last year and couldnt get over the clipping dispersal compared to my gravelys. I think that the Gravely tries to chop the flippings finer than the deere but that is not what I am after. I will post some pics of my xfactor stripes.
Gravely- 07 260z 26hpLC 08 260z 31hp
Stihl- 2 FS80's 2 FS 110R's and FS90 MS 170
Echo- 651T Backpack and HC 150 clippers
07 Bobcat s250