I use WAB for big battles as it works really well in this period and Age of Arthur is a brilliant supplement.
Brytenwalda looks great, but I haven't played it yet.
I am actually currently writing a rule set for 'big skirmishes' (30-60 models per side) that is influenced by bits of T&T, LOTR and WAB. It's my first ever go at rule writing, so will probably be utter rubbish, but if anyone fancies a copy to playtest, rip apart and generally mangle til it works (or til it drops...whichever comes first

), drop me a PM with your email address and I'll email you the first draft on completion, which I anticipate being shortly after Christmas...just have to write a couple of sample army lists and a couple of test scenarios and we'll have enough to play with...
Andy