Challenging Critera - kids, space, $3500 budget


I'm looking for recommendations for a complete main living room audio system (no tv). I'm following advice from Agon amp/preamp forums to start with speakers, thanks to all who helped. I am not looking for "best speakers I've heard" opinions. Instead, I'm looking for recommendations for speakers for my particular application, AND recommendations for pairing speakers amp/preamps/IA's. I do not do chronic upgrades and I'm looking for something solid that I can live with for a long time. Here are the details of my situation:

* I listen to a wide range of music from jazz, 60's psychedelic, drone, metal, hip-hop, ambient and electronic.

* All of my music is digital.

* My budget is $3500 for the speakers AND amp/preamp

* I have a 2 year old. The room is not the main play room, but there is some activity. I do not want to use stands. They will be relatively protected, however I do not want cones near the floor if possible.

* The living room is 12X18 and there is a large (9 foot) opening to a dining room that is 12X14. I will use this system to listen in both rooms.

* I do not have space to have the speakers 2-3 feet from a wall. Under the Mantle, there are book cases that are basically 18 inch cavities loaded with books. If i get floor speakers, this is where they will be placed.

* The living room has a mantle that is 4.5 feet high and extends the length of one of the 12' walls. The mantle is 18" deep. I have a pair of B&W 602 s3 up there now. They sound thin.
mmrump
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to clarify, if i get floor speakers, I'll place them in front of the bookshelves, but i don;t have a lot of space before intruding on the living space. The bookcases are on either side of a fireplace. There are 3 shelves in each case. the dimentions are 14"High X 18"deep X 36" wide. I've considered putting my B&W's sideways in the cavity, but haven't tried it, so they're just sitting on top of the mantle.
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A front ported tower like the Paradigm Studio 100 or Studio 60 might work for you.They are always available here on Audiogon at good prices.You might want to think about a really good integrated amp instead of separates.This would also eliminate a set of ic's and a power cord.Just a thought.Good luck in your search.