I tend to go for quality over qty and I'm always upgrading. But I tend to use this with anything I collect where I can. Now I will define that quality to me is the best looking card I can find not always the highest graded I have 4's that I replaced 6-7's in my set of T206s. It's about the overall look of the card and uniformity that makes a set for me.
Also I think you mean 4 Ruth's and 2 Gehrig's for the 1933 Goudey.
Cheers,
John