With respect to the .30/06 load data from Accurate Reloading, it might be worth noting that you won't come across many '06 hunting rifles with 26" barrels, most are less than 24". I also found it curious that their 220 MKs (1.4845" long) keyholed while 230 gr Hybrids (1.6855' long) Berger and Bryan Litz claim will stabilize in a 1:10. I've got a box of 230s, but I'm waiting for the weather to improve before I start to work up loads for them. I see no benefit in attempting to magnumize the .30/06, its ballistics have worked just fine for quite some time now, and if shooting match bullets rather than game bullets is your preference, German Salazar provides some fine .30/06 match data in his 3 part essay, "Accuracy Secrets of the .30/06" which can be found on line if you Google "The rifleman's Journal".
With respect to 7mm bullets, there is nearly as broad a selection of 7mm game bullets as there is .30 caliber, so if you can't find one to suit your needs you're not looking very hard. I was brought up on .30 caliber cartridges, so they are what I prefer, but I've owned, shot, and loaded for a number 7mm rifles including 7X57, 7-08, 7mm RM, and I had the opportunity to shoot a 7mm Ultra. If you like to shoot accurate rifles across long stretches of real estate, one of the 7 magnums is a fine choice.
Nomad 68, neither you nor your buddy will be disappointed with your respective choices.