I just bought supplies to make a 50' 3/8" immersion wort chiller. Here's my question: I spent ~$75 on the supplies, and I can get a ready-made chiller for $57 at the LHBS, but it's only 25'. Is a 50' THAT much better than a 25' chiller? I brew only 5 gallon all grain batches, and probably won't be brewing 10 gallon batches. If it's not a significant difference in performance, I assume putting that $17 towards my next batch...