2009 Tahoe 5.3L 4WD 3.42 Gears

I'll cut to the chase.

My wife and I (no kids, pets, etc) have our eyes on a TT and we're looking for experienced opinions regarding what would become the setup.

We have a 2009 Tahoe, 5.3L 4WD with 3.42 gears, 6 speed with tow mode. It has the 10k# factory hitch receiver. It is rated to tow 5700#. I have added an auxiliary transmission cooler and am considering adding an auxiliary engine oil cooler.

The TT: Koala 23LS.

Thoughts?

Thanks