Fan controller is probably tough.
Each of these cases has USB 3.0 front panel, side window, are well reviewed, are mid-tower ATX and have at least 1 external 5.25" bay (to allow you to add a fan controller).
All <70quid.... some as low as 50ish.
Corsair Graphite 230T (orange though, not to everyones taste)
https://uk.pcpartpicker.com/product/VDBv6h/corsair-case-cc9011038ww
NZXT Phantom 240 (white)
https://uk.pcpartpicker.com/product/RHYXsY/nzxt-case-caph240w1
Phanteks Enthoo Pro M
https://uk.pcpartpicker.com/product/jrVBD3/phanteks-case-phes515pbk
Corsair SPEC-02
https://uk.pcpartpicker.com/product/FtV48d/corsair-case-cc9011051ww
BitFenix Shinobi Window (not a full window though)
https://uk.pcpartpicker.com/product/rZYXsY/bitfenix-case-shinobiwindow
Thermaltake Commander MS/I Snow
https://uk.pcpartpicker.com/product/rP4gXL/thermaltake-case-vn40006w2n