If you end up with a cab with a port in the back, put it close to a wall to strengthen the sound projection. I'd also say cut the lows and boost the mids/upper mids a bit. Have a wander out front when you sound check to get an idea of how loud you are in the mix. I've had cabs in the past that don't disperse the sound very well, and what is barely audible on stage is deafening 30 feet away.