It sounds like
you have a LOT of dirty laundry - I'm not going to lie. I've fantasized about having one of those bolt down washers in my house, but really?
Anyway, I'm not sure about the store letting you try them out. I'm sure they have return policy's that you can at least return it within a certain time frame. I've read where people have had LG's for years with no trouble... but you just never know. Anway, if you end up getting the LG, just make sure you just never or rarely use cold water, use good detergent, very little fab softener......and leave those doors and the detergent cup open all the time when not in use. Use bleach in whites, don't overload the washer, and I think you'll be fine. I can tell you this, when/if my Duet ever dies, if Whirlpool or Maytag has not introduced new front load models with a recirculation pump like LG has, (which I'm hoping they do), I'm likely going with an LG FL washer with turbo wash and just hope for the best.