Boat or bank is a pretty key question. Pants vs. bibs tends to come down to what fisheries and weather you use them in (bibs shine for really messy stuff like tuna, really wet weather or open boats, while pants are more comfy to get on/off/wear and easier to answer calls of nature in).
For boat, you can use heavier (and tougher) PVC coated gear that isn't breathable. Grundens Herkules are the super heavy duty commercial, Grundens Clippers are cheaper/lighter and still plenty tough, and the Neptunes are lighter/stretchier/more comfortable. Carhart PVC gear can sometimes be found for less $$ and work great. Heavier PVC bibs can be hot and sweaty, but they wear like iron and withstand being snagged on crabpots/boat cleats/etc...
If you want something cooler/more breathable and comfortable for walking around in or warmer weather, Simms and Cabelas Guidewear are some great options, but be prepared to pay $$$ for good ones. If possible, you want the higher end Gore Tex units, not the cheaper membrane (don't breath nearly as well) or coated (coating wears off and so does the waterproofness) products. Downside to breathable stuff is it is more fragile and prone to tearing if snagged on something.