Oxfords and novelty's are fine. I have a few warm-weather things - some incredible Albini linens - that will be great too.
I'd also say the brushed twills are good - they're appropriate for cooler nights. It's about 70 in SoCal right now and I'd have no problem wearing those.
Flannels are going to be heavier, but we've got killer patterns. Probably looking at 65 and below for them to be really comfortable, but we sell thick fabrics to people in hot places all of the time.
And yes, everything is going to come with a buttondown collar and chest pocket. I wanted to hit the right price on these ($100), so that's the deal we struck.
Too bad but I understand about the need to keep the button downs throughout. I guess I could always remove the buttons but I don't know if the collars would fall right.