Not a benchrester, but I went through the very same quandry the last few weeks. Although most of my 'precision' shooting is off of bipod or rest, I do like to go offhand or with sling-wrap sometimes when needed.
Weight became the limiting factor for me. A buddy has a Bushmaster 20" bull and it is really front heavy offhand. Not unmanageable, but hardly what I would call well balanced. He has a lead weight to fill the butt-well and this does improve the balance....but at the expense of a couple of pounds extra to carry.
My search was ended when I first shouldered a Bushy Varminter. 24" bull barrel but fluted to reduce weight. Had never really considered flutes being all that effective in weight reduction but holding the Varminter and then a Varmint Special with its' unfluted barrel made a believer out of me.
I am sure RRA rifles are well done, but the only suggestion I can make is to hold one and see how heavy you can tolerate it to be. The full-bull 24inchers are a load! They will show a couple hundred fps faster than the shorter tubes, and this IS nice to have, but really not all that in the real world of varmint shooting.
Suggest you find and fondle all the respective lengths before you make up your mind.