Sight Glasses and Brew Kettles

[cearum]

What are your thoughts on sight glasses on a brew kettle? Right now I'm using the stick method; it's nice but not the best method. I'm looking to upgrade my kettle from 10 to 15 gallons, and I'm looking over my choices in kettles. I found one that offers a sight glass; so I'm debating over whether or not it's worth it.

I'd like to hear your thoughts on the subject of sight glasses and brew kettles. Also, whether or not you think a Blichmann would be worth it over one of the other choices presented.

Kettle w/ Sightglass
Kettle w/o sightglass
Another choice w/o sightglass

 

[Ozarks Mountain Brewery]

I use site glasses, I love mine for electric, melted one for my propane burner pot. Blichmann is a really nice set up but way over priced in my opinion, a cheaper set up would be

Site glasses and more
http://www.brewhardware.com/wlsightglass-60

Very good pot, as good as Blichmann quality
http://www.amazon.com/Concord-Quart-Sta ... ds=Concord

http://www.amazon.com/Concord-Quart-Sta ... ds=Concord