I didn't know about F5 - cool!
it's nice discovering these little "open secrets". My favourite was cntrl-S for search as you type
I'll work on a way to parse tasks - alphabetical doesn't do it for me. I think the order should be: TODO, CALL, EMAIL, BUY, WAIT, DONE. How's that sound?
Yes. that would be excellent. Maybe override the base F5 sorter, have it sort alphabetically, to get everything into blocks, then reorder the blocks. Would be nice if (when you add date to done) they get sorted by date. Probably easiest to stick date after done, and use (YYMMDD HH:MM) date styles so alpha-numeric sort is also date-ordered.
PS: bb for "buy with where and max cost" sounds a nice shortcut.