Need Some Recommendations in Upgrading My Family Room Speaker System

Hi everybody!

Right now, we have a family room with a 5.0 setup. All 5 of the speakers are Polk brand. The left and right speakers are bookshelf speakers due to a wall unit. We'd like to replace the left, right, and center speakers and add a subwoofer.

The shelves that the left and right speakers are located in are removable, making a 36-37" cabinet that could possibly accommodate floor standing speakers, rather than bookshelves. However, I'm not sure if floor standing speakers are called floor standing because of their height, or if they're meant for the floor. The cabinet is about 4 feet off the ground, so if it's the latter, I guess it's back to bookshelves.
As for the subwoofer, anything is open to suggestions. (If you need anymore information about this, just ask)

The room is about 21' in length, 20' in width, and 14' in height. To the left of the room are sliding glass doors. Behind, the room opens up into the kitchen. To the right, the room opens up into a large hallway leading to the rest of the house.

As for a distribution for what we plan on watching:
90% Regular TV shows/Sports
5% Movies (We have a dedicated theater for that)
5% Music (For when we have people over)

Our budget: Anything less than about $3000.

I'm not sure what brands to start off looking at, so any suggestions would be great.
Thanks in advance!

P.S. I'm a little bit of a novice when it comes to speakers and the sound part of everything, so please go easy on me.

There really aren't any stores close enough where we can listen to the speakers before. Maybe before we buy we'll make the journey, but we don't want to go up more than once.
I have looked online and saw the B&W CM5 bookshelves, but I don't know if that would fit what we would use them for, and I don't know about the quality of them. Are there any other good brands to look for? Thanks.


Ok, so I guess it's bookshelves then. We have a wall unit along the whole wall, and don't have room for floor standing speakers in front of the unit. Thanks.

Attached are some pictures of the wall unit and the room. (The pictures were rotated when they were uploaded, so you might have to turn your head)
The first picture just shows the wall unit along the wall. The second shows the cabinet that the left speaker would go into (the right speaker would go into a cabinet identical to the one shown). The third shows the cabinet for the center speaker. The last picture shows a side view of the room.

We do plan on comparing the speakers before we buy, as I realize that its very important to listen first because this is a choice of a opinion, but we also want to know some pointers and guides as to what brands/models we should look at.

Thanks for all your help so far!

We bought the house with the theater already built with a 5.1 setup, then upgraded to a 7.1. The left, right, center, and sub are Vienna Acoustics. The surround backs are in ceiling Polks. The surround sides are in ceiling Sonance.
The sound in the theater room is absolutely great, and is actually partly the reason we're upgrading our Family Room. We realize that we'll never get the same results because the Family Room is open to other rooms, not closed like the theater room, and also lacks the acoustical treatments that the theater room has.
Still though, we don't feel the Family Room has the greatest sound that it could.
The Vienna Acoustics look like they may be too expensive, so I'm not too keen to getting anymore of them (Not that it looks like they make bookshelves).
The Sonance (I may be wrong) seems like they mostly create the hidden/architectural speakers, not many bookshelves.
Right now we have Polk in the room, and we're not really finding the quality to be the *best* (Don't want to start any wars, so stating that this is opinion).

EDIT: Apparently Vienna Acoustics does may some bookshelves, but I think the price may be too high.

Thanks, Ziegl! These look very nice, but there aren't any dealers near by me to let me hear them before I buy them.

Speaking of which, I have made an appointment to compare various speakers this Saturday, so I'll report back then. Before I go, though, are there anythings I should be looking out for when I listen to the speakers?
Thanks again!