Wow.
See the FAQ and Shape Chart links at the top/left of this page for more info still.
http://www.aspipes.org/
You have a lot to choose from. Start your cleaning experiments on something, uh, less special. Which is that? Ask. Stems on most (but not all - Kaywoodies in particular) pipes are intended to be twisted off (and put back on, too) in a clockwise direction. If something won't budge with only gentle force, stop and ask. There are tricks for unsticking things without snapping stems or shanks. (Don't mess with the Dunhill 'til you know what it is and how to fiddle with it properly.) If you lay in some olive oil, a reamer, some MicroMesh paper (3000 to 12000 grit), cotton balls, Everclear and Halcyon or Paragon pipe wax they can all look like new (before winter is over, maybe.

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I would be a kid in a candy shop with that collection. Have fun.