That is really up to you. Get the one that you like best or, if you can, get them all...
I have no experience with the Portugieser Chrono but I love my ZF IWC 500705 Portugieser Automatic very much.
ZF makes Portugieser Chronos, too. I think the black dial one looks really nice. It is available, e. g., from JTime Watch Store and from other dealers.
If you so decide, you can also sell your watch again here, without losing too much money.
Hope this helps.