I’m surprised really. If I have a Towered Amiga then a busboard with PCI to me is a no brainier. Unless money is the issue.
For browsing on a Amiga, you do need a good workbench resolution. Where the native AGA can slow down the system the higher you go and more Chip RAM get used.
Have you considered getting a PiStorm 32 Lite? I believe Networking is going to be an option like the Vampire cards… plus you get a built in RTG option using P96 (Even using the free version off Aminet).
All the best.