Seriously? Why Buy ARC Ref 6SE? seems Benchmark LA4 is a better choice.

And costs only a few grand vs soooo much more for a ref 6se preamp.  Benchmark LA4 Does HT bypass very easily.  
I am at a profound loss.  what the heck is going on inside the Ref 6se box.  What the heck does it all do? 
6se is very pretty but Benchmark LA4 also looks nice. And the McIntosh c1100 preamp is also very pretty.  Frankly, what justifies buying a preamp at such a high price?? It is supposed to be a neutral pass thru of a signal.