For as little as you're towing, I would say no to the diesel. For a daily commuter gas engines are a better choice in my opinion. Where the diesel really shines is in towing, especially if you tow the mountains a fair bit. While you hear a lot about diesel torque for pulling the hills, you don't hear as much about the engine brake on newer diesels which is just as sweet in my opinion. I find I can control my speed on downhills with the engine brake alone on my diesel where I would be in 2nd gear constantly hitting the brakes to keep from over revving the engine with the gasser.
Back to the commuting thing, I find that this time of year when it's really cold outside I'm just getting the diesel truck up to normal operating temp by the time I get to work, which is not particularly good for the emissions system. I use the truck almost exclusively for towing, hauling etc and use a gasser to commute.