If it is to carry a TC primarily, add the DRW option. I had 3.73s on my SRW and have 4.30s on my DRW. The difference is way more acceleration and power loaded especially going over the mountains. The SRW with 3.73s was ok, just not as powerful.
You'll pay a MPG penalty with lighter loads with higher gearing. I like the higher gearing and not shifting going over the mountains, but it does impact MPG. I bought a truck with 4.30s because I thought I might tow a heavy fifth wheel later, but I've been watching the youtube videos and thinking about how long the things are, and now I'm not sure if that will ever happen. :) 24 ft vs 55 ft or so is a big difference.