First blush: 7mm-08
Regarding "holes" in your lineup, what are you lacking? Do you have an all-weather hard use rifle?
I have a bunch of overlap from 22LR to 375 H&H. No holes. I have all-weather (stainless/synthetic/laminate or cerakote/synthetic/laminate) rigs in 338 Win Mag, 300 Winmag, 30-06, 270 win, 260 rem and 22LR.
Do you have a short/handy carbine?
Model 7 in 260 20", and a 30/30.
Does a pretty walnut "beauty queen" appeal to you?
Absolutely. I have a Model 70 Featherweight Grade III in .270 win that is one of my favorites. Also 2 custom 300s, one on a 98 action and the other on a Model 70 action with nice wood. The Model 70 wood is especially nice. Also many other wood stocks on a Ruger 77, Ruger Safari Grade 375 (nice wood), Model 70 Sporter Varminter in 243 etc.