These two (unlike the Corsair) would be in budget:
https://www.amazon.com/Thermaltake-Suppressor-Certified-Computer-CA-1E6-00S1WN-00/dp/B017NWO5V2
https://www.amazon.com/Thermaltake-Micro-Computer-Chassis-CA-1D5-00S1WN-00/dp/B00PDDMN6S/
Top rated on Amazon (along with the Corsair)
One that is a quality brand and super cheap, so long as you want it in white (and no window):
https://www.amazon.com/Silverstone-Plastic-Mini-ITX-Computer-SG05W-LITE/dp/B00CKNOVLO/
Just curious, why a window? I buy PCs to work well and be quiet (so I am not bothered while using it). WIndows make more noise and serve no function that makes sense to me. I know people buy them, but never could see why.