if you intend to go with flats along with toe clips, I don't see why you would want to use flats with pins.
Flats without pins can result in slip-offs, depending on specific pedals, your specific shoes, if wet, etc etc but toe clips will stop that.

I use all kinds of pedals, mostly spd's, but flats with pins also commuting (summer months as well as Canadian winter months). I am wary of shin scraping, but so far over the years (touch wood) haven't had bare leg incidents (luckily only one or two when having falls wearing full on winter clothes, snow pants, thick long underwear)
I use RaceFace flats and similar looking but less expensive ones on my winter bike (as they get the heck salted out of them here)

I do tend to dial down the studs to a lower position to have them not sticking out so much from how they are when sold, and still find they hold my feet well in place even over very rough city roads we can have here -- certainly more secure than non stud flats that I have used--but don't forget, shoe sole differences can make a real difference here too.

there certainly are a million flat pedal options out there, different shapes, sizes, qualities (and prices) but having the option to mount toe clips will probably reduce your options, and I suspect have more options of just so-so quality pedals---but I freely admit I don't know the market enough.

good luck with getting some suggestions
As with a lot of bike stuff, not getting cheapie stuff usually is better in the long run, good quality pedals will work better and last much longer. Going into bike stores and feeling how diff pedals turn and the overall build quality can give you a much better idea than just looking at photos online.