I moved over to Air Guns 8 years ago and felt the same way about if balance is important.
When getting started I spent way too much money getting the gun set up and into an absolutely beautiful Mike Turner Black Laminate wood bench stock, plus adding a few other doo dads. It is beautiful!
I still have it in that stock, but the point of balance ended up forward of the intersection between the barrel and action due to their being a fairly large air tank up front, plus I added a custom barrel and the equivelant to a tuner, an Air Stripper made from brass. The gun does shoot lights-out, but is front end heavy.
In Airgun Benchrest we also shoot free recoil from the same rests as used in rimfire, both 2-Piece and One-Piece. The problem I found with all that weight being out closer to the muzzle is, this gun requires me to apply a good amount of pressure just above the pistol grip as it will float otherwise.
Even though I've always believed in positioning any gun as far back in the front rest as possible, the butt end is still to light and needs added pressure to keep it stable. Someday I'll probably either add some lead under the end cap (in airgun, the Class I shoot allows up to 15#, so I can add just under 5# and still make weight).
I don't know if any of this helps, but it is another opinion coming in from a different angle.
Good luck.
Dave