I'm not hugely bothered about having front and rear tyres matched - I'll use what I've got (currently I have a small stock of new Metzeler 6-Days). But there is a good range of Mitas tyres to cover a whole variety of conditions and uses.
I use mousses but when I used tubes, 12 - 15psi was the norm. As Timpo suggests, your pressures (particularly the front) needs to be at the higher end of your preferred range if you're riding hard on rock surfaces where 'snakebite' punctures are more likely.