I haven't had an immersion chiller until now. FYI, Lowe's (at least the location at Zion Crossroads) has some excellent prices. I picked up 50' of 1/4" tubing for $23. Yeah, that's right. I built an immersion chiller for less than $30. I think 3/8" was $10 more, but that was too pricey for me.

Get it now while copper prices are low!