Sorry to hear you fried your pre-pro, even if you didn't buy it...
As a replacement, I'd recommend a Denon X4000 ($1,299), X3000 ($999), or X2000 ($699) receiver. They are all 7.1 or 7.2 channel receivers. The main differences being the power of the amplifier sections, (125, 105, 95 WPC respectively) and the flavor of on-board Audyssey room correction. Denon has a control app for iPhone, which might make operation a little easier for your family.
As a replacement, I'd recommend a Denon X4000 ($1,299), X3000 ($999), or X2000 ($699) receiver. They are all 7.1 or 7.2 channel receivers. The main differences being the power of the amplifier sections, (125, 105, 95 WPC respectively) and the flavor of on-board Audyssey room correction. Denon has a control app for iPhone, which might make operation a little easier for your family.