I'll let others speak to their prefferences / dislikes / likes about the different styles / brands as I am obviously a bit biased.

The only small point of clarification is that the Semi trad does NOT have the Perma Pleats. Only the Casual does. This is NOT to mean that the Semi Trad doesn't hold a pleat... it does very well. The perma pleats just don't work well on the Semi Trad.

I'm sure you'll be pleased no matter what you decide and I'm sure you'll get lots of helpful advice up here.