I have the ZBROZ (ARS-FX) A-Arms, the 40" wide with 17" c-c fox floats...
the zbroz a-arms are the best thing i have bought..i have blasted trees like no other...and by no means on purpose and i have no issues, and they have held up great..they are extremely strong and very durable..and they also give you a slight raise in the front end and more center ground clearence
i even had a slight run in with an M1000 and we collided about 35mph and my a-arm hit his running board and smash it upwards..and i have a VERY slight dent in my arm..and does not affect steering or angles..
my wife has the HOLZ 41" A-Arms with 17.5 c-c Fox Floats on her 06 RMK 700,
they are very nice looking...appear to be strong, and i belive they are superior to OEM arms, but in NO way do i think they are stronger then the ZBROZ arms..but worth it if you get a great deal, but they are the SAME price as zbroz..
just my .02