Re: little screamin' deamon or Lil' 59 for strat bridge
The lilScreamin Demon is a slightly hotter version of the lil59, both will work in a Strat bridge slot very well if you are looking for a humbucker tone from your guitar.
The Twangbanger makes a Strat Bridge slot sound like a Tele. It's a major tonal improvement to a Strats normally weak sounding bridge slot if you like a Tele bridge tone. It sounds nothing like the lil59 or lilSD.
Re: little screamin' deamon or Lil' 59 for strat bridge
I really like the tone of QPs. The Boss used to use QPs in his teles, that'll give you an idea. If you find the tele bridge (or strat) icepicky and would like more output, QPs are great.