K70 (Cherry MX Red) because mechanical keyboard addiction and I miss media/volume controls too much. Will buy some 40A-L O-rings from WASD keyboards aswell to test how quiet reds can really be.
Haven't had one of those myself, but I heard the keycaps they use are pretty poor quality and come off by themself when mashing the keys repetitively.
G710+ is propably best value for money, seen them go for under 100€ here and it comes with pretty much all bells and whistles. It's just an awful looking thing and I personally don't like brown switches.
Edit: Apparently G710+ can suffer from backlighting issues, so beware.
I prefer them (non leaking) too, but it doesn't really bother me that much. I tend to keep the backlight at the lowest setting or completely off 99% of the time.
There's no way to even stop it from happening with the K70, because the switches (and leds) are bolted directly to the aluminium top plate. It makes cleaning so much easier compared to other keyboards, but some light will always leak to the chassis plate.