Speaker positioning?

I'm trying to figure out where in our living room is best to put our speakers. The room is 14'x25', and "bright" sounding. We just got a puppy, so floor "treatment" is unlikely soon, and I haven't talked my wife into wall or ceiling treatments.

I used to have the speakers about 6-8 feet apart in the middle of the long wall, and sat about 6 feet from them. They seemed too bass-y crammed against the wall like that.

Now have them along a short wall, at one end of the room. They are 2-3' from the side wall, and 4-5' from the back wall. I sit about 10' from them. This has helped the bass, but now the high-end seems overly bright.

We are on the verge of bringing some furniture in and putting the stereo gear into it (electrician and all) -- this may make my choices more or less permanent! I don't want to lock in anything I'll regret.

I would appreciate any suggestions on other positions to try.

Thanks!