I'm looking for a wicked grapple to do mostly moving large rocks and digging up roots as well as moving brush obviously.  I'm pretty sure I don't want to give up the load carrying versatility of the long bottom to gain a bit better root digging ability.  I'm also thinking of getting a stump grinder to take care of a few stumps and the grapple is going to be used to dig up any remaining roots.  
you mentioned the dual lid is better at grabbing loose firewood and I can definitely see myself doing that in the future.  My main concern is about visibility because one of the uses I plan to use the grapple for is to pull out saplings but for that I need to see where I am pinching and from the few pics I have seen on your site that are from the drivers view.  seems to me like the dual lid may have better visibility for that purpose.  
I read a thread on here that someone built a sapling puller adapter plate to bolt on to the grappler but for the life of me I can't remember who did it and I can't seem to find the thread.  
I think I have it narrowed down to a 54 or 60 inch long bottom dual lid.  my front tires outside width is 63" but I was hoping to keep the grapple smaller for more maneuverability in the woods.  tractor is a kubota 4740 cab with la854 loader
Does my reasoning make sense?  What is the lead time on one of these?