RE: Second rifle choice?
Honestly? I think you should go with whatever cartridge you are most interested in, or comfortable with. Whichever cartridge suits your needs the best. For me to say any specific cartridge would just invite a big debate, which there are many already on the forum ready to read. And seriously, there are any number of cartridges that will do what you want. It all boils down to personal preference really, but my point is, it's going to be your gun, get what you want, not what someone else wants you to have. But, if the two happen to be one and the same, there's no real problem either.