The choice really depends on what kind of on-street ride quality you want, what kind of off-road performance you're looking for, and what's your budget. ICON's components tend to provide a bit better bang-for-your-buck performance, especially since Fox doesn't currently offer a UCA. Fox's 2.5 coilovers and rear shocks don't ride quite as stiff on the street as ICON, so if you're looking to maximize street comfort while still getting 2.5s all around, then Fox may be a better choice. Most of us at Stage 3 prefer ICON due to their slightly better off-road performance and handling.