What I mean by that is how long would you be willing to keep a "good" bottle of wine in a refrigerator without humidity control and/or how good of a bottle of wine would you be willing to keep in a refrigerator? I mean, would you be ok with keeping say a 2005 Margaux in a refrigerator without humidity control? And, for the record, I don't currently have a 2005 Margaux, but who knows what the future will bring.
I should have known this, but I seem to be quickly outgrowing my fridges. Right now I have roughly 60 bottles of wine in 2 separate fridges that I keep at a constant 55 degrees. I seem to be buying more than I'm drinking and I've also noticed that my tastes are skewing more and more expensive. Yeah, I may have a problem.

Most of my current wines can be consumed now, but I do have some Bordeaux that can benefit from some more aging. I guess what I'm asking is, based on how my wine experience is going so far, should I just bite the bullet and invest in a humidity controlled unit, or can I still get away with aging wines in my fridge for another 4-5 years and would you do that with a say $300 bottle of wine?