The wire supports are almost completely invisible in the Flir ONE's 80 x 60 resolution, even WITH the added outlines from the visual camera. You get more resolution and snap in the other two cameras, again with an obvious winner in the 320 x 240 resolution. And by the way, anytime you use the infrared camera for home performance testing, you should DEFINITELY always use a blower door to reveal the air leakage- otherwise, you're at the whim of stack effect, wind, and HVAC pressurizations.
I hope this helps with your decision- being a building performance analysis ninja means having the right equipment, and there's probably a reason why the nice tools don't get carried around with you everywhere (hint: $10,000)- that's why it's nice to have a range, if you can swing it!
To find out more about how to use infrared to understand home performance, watch this: