What is the best .22 LR upper out there?

[TacBlade]

I guess imschur could answer this, as he has a great site for this.  But, I thought you guys would like some input on this also, so I will ask it over here instead!!!  I had a CMMG at one point and sold it, but I wish I would not have.  What is the best dedicated upper out there in .22 LR?  I am really liking the Billet Mags by BlackDog that you showed us imschur!!!!

[imschur]

Compass Lake (CLE), Kies and Spikes.

CLE is probably the best but they are not cheap,

Kies will make you anything you want

Spikes has optional Lothar Walther barrels