Let me urge you to rethink this.
Just like buying a safe for firearms, the rule should be "Buy the next size larger than you think you need."
Inevitably, you'll end up in one or more of these places:
- This works well; I wish I had more capacity
- I really wish I could cold crash in the same keezer
- I really wish I could force-carbonate cold.
- I really wish....
I thought mine was large enough--I have capacity for 7 kegs--and even that's not enough, not if I have a keg in reserve for two or three brews. I have four taps on mine, and right now I have six beers either in kegs or ready to come out of the fermenter. I'll bottle the rest of one keg to get it out of the keezer, and put in the other two, which will leave me 5 different beers, four on keezer taps and one dispensed with a picnic tap. I originally thought a capacity of 5 was more than enough. Now, a capacity of 7 is less than I wish I had.
As time goes on, you'll become....sensitized, I suppose is the word, to what a deal is on kegs, regulators, and so on. Craigslist is full of such deals and you'll find them here on HTB from time to time.
Or you'll be lucky as I was, when a friend had an old 10# CO2 tank and regulator he wasn't using any more. He offered them to me if I'd buy him lunch when he visited. Well. The keg was out of certification; it cost me $41 to certify it *and* fill it, and suddenly I had a system where I could force carbonate out of one tank while the other served my keezer. So for the cost of lunch and maybe $49 total I had a 10# tank, filled, and a regulator which works great.
Know what things cost new and used so that when a deal surfaces you'll know it, and can pounce. You can then sell it off when and if you get something better.
Anyway, if you think you need one with capacity for two kegs, consider one that can handle 5 or 7 kegs.
My 2 cents, YMMV, keep your options open, and welcome to the world of keezers and kegging.