Question about upgrading to a new reciever

[Vincent Vega82]

I currently have http://reviews.cnet.com/av-receivers...=rightCol;also with http://www.bose.com/controller?url=/...s_10/index.jsp

speakers with the exception of another double cube speaker for the center channel speaker. I bought it in 2005 and am not looking into spending the amount it would cost to get a whole new set of speakers plus sub then, a new receiver. I live in a condo that has a pretty good size family room. The room is however connected to 2 other condos via 2 separate walls one on the left and one on the right of the room. I'd be getting the receiver primiarly for clearer sound You think it'd be worth it w/my stimulus check to get a new receiver or not?