@ AAACHIPSET
well my 2 cents is you seem happy with your current setup and it doesnt look like adding the fastest PPC card will get you running that much more stuff you already enjoying and most importantly still wont get you up to modern browsing.
With the crazy costs of classics PPC cards nowadays I would rather buy either a new/ used Sam460 with AmigaOS4.1 or if you already have some old Apple hardware lying around your place try MOS. There is also AROS which is making great strides on bog standard PC's as well as netbooks (I personally use AspireOS on an old Netbook and it's great fun)
I personally have found that since moving up to AmigaOs4.1 my 1200 with 030@50 is sadly hardly ever used nowadays as I can do all my net browsing comfortably and my favourite 68k apps & games run great on OS4.1 and seamlessly with great programs like glUAE or RunInUAE. A bonus is you can dual boot into Linux Debian and instantly use the multitude of apps available as well.
The best part of getting a NG Amiga system is the community support whether that be AOS, MOS, or AROS!