You should use whatever method of study appeals to you. Keeping your interest focused is more important than following someone else's concept of the best study method.
If Bertok vs Fischer 1962 appeals to you, then you should check out Fischer vs Spassky, 1972 match game 6.
I was recently grateful for a piece of advice I received on this forum with regard to going through one annotated GM game every day - it is something that I will try to do.
There are a couple of games in the books I have that are specifically in the openings I want to use initially, but whose ideas are perhaps a bit beyond me (Bertok - Fischer 1962, Bobby Fischer My 60 Memorable Games; Tartakover - Domenech, The most instructive games of chess ever played, Chernev)
I do look at other games, but I do find myself putting these two games up on the board a lot - is this a good or a bad thing? The annotation in both books is good (in my limited opinion!), and I do walk myself through it at different variations suggested, but is having a couple of model games like this a bad thing? Should I just move on and cover as many games as possible, rather than dwelling on a few that take my fancy?