My wife thinks I should get a .308
Why would she say that?
Hmm, sounds suspicious, you either need to wait for the motive to become apparent or rush out and buy a nice one quick before she changes her mind! Trouble is once you have done that you are right where she wants you, even though you will be well armed I would remain slightly concerned!!
If you are looking to cure the "Little w**K" problem with the "Big gun" solution might I suggest a 50-70?
SS