I'm curious as to when LWRC went to the cheap standard stocks and grips? These are both of my LWRC's. The top one is a standard M-6, the lower photo is my Paul Howe CSAT Edition. Both came in the box with Vltor E-Mod Stocks and Mag-Pul MIYAD Grips.
If your going to swap out the stock and grip I would recommend the Vltor E-Mod. It's really well made and give a much better, more comfortable cheek weld than the standard stock. I left the Mag-Pul grips on both of mine, but I like the Ergo Deluxe Tactical Grip much better. I have large hands and the Ergo seems more "hand filling" than the Mag-Pul with the large insert installed.
For iron sights I really like the CSAT Sight that's on my CSAT Edition LWRC. You can buy them from XS Sights. Here is a video of Paul Howe demonstrating how they work. It's a really simple concept that works well. I can't believe someone didn't think of this before.