Lots of responses here already so I may recap some. 15 gallon kettles will work fine for either 10 or 5 gallon batches. Just make sure to do the math correctly as the efficiency of your equiptment will change. Doing 5 gallons in a 15 leaves a lot more room. If you use Beer Smith and get your...
I have the same one I got from an old timer with some other old home brew equiptment I repurposed and restored. Had some rust I cleaned up on it. From my expirence I like the new guys better. I got it to work but sticks on some bottles and if you grab it in the wrong spot to remove it can pinch...