people that are saying solid mounts suck are also talking about different engines. some engines run much smoother than others. I have only ridden in sho’s with solid mounts and they arn’t that bad. it would be anoying on a long trip becuase your ass will go numb but the performance gains are worth it. + it is a interesting fealing to hear and feal the engine working it ass off 
when i ran open dump on the SHO there was so much vibration from the exhaust pulses it flet like i had solid mounts.
open dump + solid mounts = the win
quiet exhaust + solid mounts = the loose