As @TheGreek has said, there are are many different models and eras to choose from.
If you're not wanting to go for one of the larger rather lovely UV lit 3U heads, my favourite 2U model is the AH250 GP12 SMX. Plenty of power, easy carry, a very (very) subtle valve in the pre, dual band compressor, pre-shapes 1 & 2 for blending in with the graphic and my favourite feature the EQ balance with which you can effectively 'tilt' the EQ with a simple turn of the knob to suit the room without having to mess with your graphic.