T1X / Bravo would be my choice.
Started with a T1X + Bravo. Went to T1X + MDT ACC. Went to T1X + MDT ACC + IBI Barrel. Sold it all, ordered Vudoo + ACC. Shot a 10/22 in an MDT Oryx for 3 months. Now I shoot the Vudoo.
So yes, you can see that was a ton of money spent.
What did I learn? Factory T1X shoots sub moa at 50 yards, which are the requirements of NRL22. Smallest target @ 100 yards is generally 1.5-2", which my T1X shot with SK+ 99% of the time. They throw in a 1/4" at 35-40 yards sometimes.
Chassis is going to be where you find the most comfortability behind. I liked the MDT ACC, but overall it's way too heavy and hard to balance. To balance a MDT ACC, the rifle will be about 15lbs. KRG Bravo is much lighter, but you have to like the way the grip feels since it's not adjustable.
Arca rail is a must IMO to be top tier competitive as it allows you to 'game' a lot of stages by adjusting where the bipod sits on the rifle.
Add a good bipod as well.
Lot test some ammo, order a bunch of it once you get your lot. It's a waste of time to buy brick at a time and spend 100 rounds re-doping it and rezeroing it.
You can replace T1X with CZ* as well since there's equal aftermarket support for both. The nice thing about some of the T1X stuff, is if you buy MDT, the stuff works for their T3X too, so you can interchange things for your centerfire. Same with the T1X trigger it uses T3X triggers. That's the one reason I went T1X as I had a T3X.
When you start getting into the Top 5's and doing really well, where you're losing to the top shooters by 1-2 shots, then you might decide that a Vudoo or RimX is worth it. When you start losing by 1-2 shots you might decide that Center-X or Midas+ is worth it too.
I'm shooting a Vudoo now, sold of all my Tikka stuff, and run R700 pattern for centerfire too. None of this made me really jump up in positions. I shot like shit yesterday at my match, the targets were generously big, but I have not spent time on dry firing and fundamentals and was just sloppy and unstable.
Best advice is, choose a setup, get your ammo sorted out and spend a shit ton of time practicing on ladders, tires, buckets, offhand, etc. (on the clock) Don't sit around in prone shooting groups for hundreds of rounds, that's not how NRL22 works. I got my Vudoo a few months ago, and literally just sat around enjoying shooting little groups at 50/100/200. Scored new bests in my 6x5's. Went out to a NRL22 match with my new rifle and was just rusty and had my worst score outside of my very first match a year ago.