I didn't state they were crap, I merely suggested you could upgrade them if you were looking to upgrade your audio setup at all.... Not sure why you've gone full blown defensive from that?
The Kaves aren't, imo, especially comfy and 'virtual' 5.1, whilst far from terrible, is inferior to headphones with a wide soundstage, good clarity and a mid-emphasis for positional accuracy. For £50, the Kaves are good, for £100 or greater, they aren't so good.
If you were looking to upgrade your audio in any way, headphones are normally the best choice. This is for the following reason, a £150 DAC or £150 amp won't make £50 headphones sound better, in fact they will highlight all the downfalls of that headphone. Essentially, the easiest and most surefire way of improving your audio is to upgrade your headphones - that was all I meant