Already tried the BA 'L' cushions, and while they sounded good, as well as comfortable, I prefer the Grado cushions to any aftermarkets, and especially the Grado G cushion with both, my GH1 & GH2. Hopefully I'll get to hear the GS3000x in home on my gear so I can make a decision if I prefer them over both of my latter Grado headphones mentioned.You need to get some Beautiful Audio pads for those beautiful headphones.
If I do decide in favor of the GS3000x, I would be selling both as I've been trimming down my headphones as well as my gear. I've always favored 'less is more' but this hobby can send you in a downward spiral quickly and before you know it it's just too much...well at least for me.