Best rolex companion to an explorer for a two watch pair

[Purspl]

Hello everyone

I'm looking for a second and final watch to join my explorer 40mm. I would like it to be a bit sportier and with some colour. The explorer is formal enough for me to wear with suits for work and it also does very well on weekends. But I am going to buy a second watch anyway.

I've looked at the Batman gmt, the Rootbeer gmt, the polar explorer 2, the starbucks sub, the green seamaster and a couple of planet oceans.

Anyone had similar decisions to make or have any thoughts on which model may best fit my bill? Thanks.