Brainstorming Tahoe Z71 vs Suburban Help!

Thinking about getting a Used SUV. Need help with choosing between what would best suit my needs. Situation is I drive around 20 miles per day. I would be towing a 2008 MasterCraft X45. My tow to the lake is around 3 miles that includes going up a pretty steep 700 yard hill on the way back to warehouse. I currently have a 2002 Toyota Tundra that I have had for 10 years. Love the truck but my kids are getting to be to big for the small backseat. So what I want is a SUV capable of pulling the boat but also nice for driving everyday around the city. I am not a huge car guy so I don't know all the details on motors or towing capacity of the Tahoe or Suburban. Any other suggestions are welcome just know that I'm pretty set on an SUV (need a change from truck for a while). Hopefully people with experience with either of these SUV will chime in. Thanks