not to mention more healthy 
OK, is this 4.1 FE designed for people to purchase that don't have next gen hardware or BlizardPPC/CyberstormPPC?
Like for example, would this allow me to run it legit of I wanted to do so on my overclocked i5 under UAE?
WinUAE is not officially supported by Hyperion, if it works or not has to be tested, the different versions of AmigaOS4.1/4.0 did not come out at the same time, make sure to buy the correct version (classic).
would this allow me to run it legit
If you buy it, you own it, if you do not have BlizardPPC/CyberstormPPC you might need to find the ROM file for that somewhere on the internet, so legal you might get problems with bplan/DCE or some company like that, but I doubt it. Its abandonware the roms are not sold anymore so has no commercial value.