Not a Rem fan myself but I am a HUGE fan of the old 06. It is extremely hard to beat the versatility of that cartridge. Huge range of factory loadings out there and available just about everywhere. I don't think you are the type to take shots past 400 yards Teal and it is past 400 yards that the 300 WM shines brighter than the 06. 400 and under, whatever you hit with either one will be just as dead. Same goes for the 7mm RM. You would be really best served to get into reloading as well. While the factory loads for the 06 are fine (or at least they used to be I haven't bought factory for an 06 in 30+ years) you can customize a load for each particular rifle you have to find it's best performance level.