My two cents: I've used the HIP4081A which is similar to your choice. I had a hard time getting rid of a sneaky current loop so I would recommend you watch out for proper layout and use a single ground return point.
As for MOSFETs - and I'll likely draw the ire of some here with this comment - I'd go for the lowest RDSon on a rated device. Highspeed, etc are not that important in this application. Keeping in mind also that voltage rating should be high enough to account for motor back EMF and a few techniques like a parallel diode across the FET input resistor helps drain it quickly and avoid cross conduction.
I like Atmel micros better than Microchip's but that might be a moot point soon if Microchip succeeds in gobbling up Atmel. Doh!