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drhuner -

I have heard positive reviews of both. You may want to check out the following forums:

http://www.network54.com/Forum/275684/
http://www.network54.com/Forum/79537/

You might also what to check out the user reviews on www.pyramydair.com for both.

Tom Gaylord has done a review on both as well:
http://www.pyramydair.com/blog/2005/08/crosmans-2240-are-we-having-fun-yet.html
http://www.pyramydair.com/blog/2006/09/crosmans-2300t-part-1the-other-miracle.html

Tom's reviews are typically thorough. They are usually positive as well so make sure you check out the user feedback as well.