TX brewing does not include free shipping like Colorado Brew and Spike so that should be taken into account. Shipping is probably an additional $20 or more.
You are correct. I think for me it would be $205 total. For Spike, I would still need the purchase the ball valve and thermometer, and then I would need to purchase a sight glass for gallon markings. That ends up being a $140 difference. I know there are some reasons for price difference, but for my preferences it seems to be a good value.
Edit: I see Spike has a new kettle coming out soon with internal gallon markings. I'm curious what the price will be on those.