i addicted to this thread liao >.<
have u personally tried the different switches? because i enjoy typing and gaming (more typing now since i can't game at work) and before getting my first mkb, i thought i would love brown switch. but after i tried my hands on both brown and blue switch, i fell in love with blue switch. it's so clicky and satisfying with each keystroke

but the enjoyment is not for the people around u.
if the design is what you are looking for, then go ahead. there's at least one more user here who uses a k70 and one of my friend is using a k95, both of them like their keyboard's design.
for the k70, the special WASD12345 keys are fortunately, available to purchase in taobao

but if you are into keycaps changing, do note that when u buy aftermarket keycaps set, u'll have a hard time getting a desirable result at the CTRL ALT SPACEBAR row as it's of different size. it's not totally impossible to change them, just that you have to be more creative and spend a little more money on it

and yes, most of us are into keycaps changing. i know of one particular user here who regret and is in so much sadness that his keyboard is not standard layout and couldn't change all the keycaps.

I will still avoid 6.5x length spacebar boards at all cost b4 any keycaps maker start producing pbt or metal spacebar for it.