I know this post is almost a year old but this question comes up alot so I thought I'd throw my 2 cents.
Precision rifle isn't something a new shooter should get into unless they have a superhuman tolerance for frustration. They might spend a lot of money on gear that would be better spent on ammo and shooting.
Any beginner can take a precision rifle, shoot it at a hundred yards, and get good groups. But that rifle at a hundred yards could be masking bad habits that won't show up until you try shooting at 300 to 500 yards. Those are the distances where you can have zero hits on target and maybe no visual feedback. If you have a big enough bank account, you can eventually figure out what you are doing wrong but you will be shooting expensive ammo while doing that.
My advice is to get good glass, get a good rifle chambered in 22lr, feed it good ammo and learn to shoot it out to 100 (or more) yards. If you can read the wind well enough to hit your targets at this distance with such a small bullet you'll be well on your way
Good is going to vary from person to person so you'll have to do your own research. Personally, I would buy my rifle optic first and mate that to a 22lr rig. It won't be overkill and you'll need to become intimately familiar with the reticle and turrets anyway.
The gear is only part of the equation. Learning how maintain natural point of aim, knowledge of ballistics (external and internal), trigger squeeze, breath control, and follow through are basic skills that have to be developed first to some level of proficiency. That will only happen with time actually shooting.
checko, I'd love to hear what your friend decided on and how he's coming along shooting-wise.