I think this is where I'd come out as well.
It's a very strange time, to me, to start investing in comics today. Everything of "value" has run up so far so quickly, and nobody really knows how it will shake out. Plus bear in mind that comics have a lot of deficiencies compared to investing in other vehicles. They have high transaction costs, are potentially lost, damaged or stolen, not normally insured, and are heavily tax disadvantged when selling. It's easy to play Monday morning quarterback and pick out singular winners over the last 10/20/40 years, but overall unless you were extremely astute the stock market would have been a better investment.
So basically, I think just buy what you love and think in those terms, and if they make money, then great!