Next week i am buying some new GK cabs, my Ampeg SVT-810E is sold and i need something new. I am either going to but a GK 410SBX and a GK 115SBX OR a GK 810SBX. I keep seeing that the 410 and the 115 of this line either have or had quality problems (failing speakers, handle and caster breaks). How true is this, does the 810SBX have similar problems.