OSPF broadcast vs. PtP modes for routers with switch chips

I'm planning an OSPF network where there will be a lot of routers with at least 2-3 connections to other routers. The array of ports on every router has a link to the processor with a speed lower than the total speed of all of the ports combined. However, to help with this, each router has a switching chip built in to switch frames at wire speed. These switch chips don't support switching VLANs, so they're pretty basic. Therefore, would it be better for performance to use OSPF broadcast mode instead of PtP that I was originally planning? The only problem with that is that some router will have to be supersized to distribute all the routes, and I'll also have a giant L2 network which may or may not be a good thing.