Match Grade BCG, Necessary or Hype?

[boombatz]

Hey everyone,

First post here on the forum - Working on putting together my first Grendel and have started with an 18" Wilson Combat barrel. I'm hoping to see what kind of accuracy I can squeeze out of the rifle and am somewhat on the fence about a match grade BCG such as those from Young Manufacturing. I understand the premise being the tighter tolerances counter the non-distributed force from the gas key. I look to you experienced folks for feedback -

• Do you have experience using a match grade BCG and have you seen an improvement in accuracy?
  
• Would combining this with a billet upper further reduce "slop" and improve accuracy?
  

Thanks in advance everyone, very cool forum!