Your favorites? The strongest by far? Ones always in your arsenal?
Ones which do require a serious deck switch, but can be very self working, and result in very strong magic.

Lets leave out single off color card effects, single duplicate card effects, stripper, Svengali, invisible, and brainwave, and/or memdeck stacks.

I'm working through a brick of cards, setting up different effects which I can pull out of my bag of tricks if needed at any moment, if someone is burning my hands a bit too much, or if need something that can engage people in a different way than your average "pick-a-card".. or "watch me do this". routine.

also.. I'm marking the bottoms of my decks right by the barcode so that I can quickly find the right setup deck for job. any other ways that you keep track of what deck is what?
Any ideas?

Triple Vision by David Regal is pretty amazing.

I'm really happy with a routine I worked out using the Unshuffled deck by Anton James (or the OCD deck by Sansmind is the same thing).
I can ring in Unshuffled after a couple card effects with a regular deck and it totally kills.
Plus my Unshuffled routine has a kicker ending with a signed CTW which allows me to invisibly switch the regular deck back in if desired so I can end absolutely clean if I so choose.
I've come to the conclusion that it makes it worth carrying an extra deck.

I have recently been playing with Paul Richards "Double Take" a double color changing deck, that is not all that gimmicked.

If you haven't seen it, look around on youtube, or Elmwood Magic who distributes it.

It is one of those effects, that once you see it, you won't believe how simple it is, in method and performance.

Couple it with my reverse pressure fan (DVD of fan, and utility applications to come, when I get in the mood... ) as a display of the colored changed deck, and it is truly magical. But it is pretty good with a simple thumb fan as suggested in the video that comes with the deck. I lost my deck, but made a new one easy enough.

David

You can't beat GET SHARKY for audience reaction as they handle the gaffed deck and in their minds the magic happens in their hands. Another killer and often overlooked is ASCENSION by Nick Langham marketed by Alakazaam. Both of these always receive a NO WAY response from spectators.
Mike