i actually bought my receiver and center channel from crutchfield and my first 2 speakers from montgomery wards(think they are gone), it was prolly a good year or two til i got my floorstanding speakers and it wasnt til about 2 years ago til i got my current surround sound speakers. so if you have a budget right now, i would suggest getting a receiver for the price that you can afford and just hook up the speakers u have now to it. that is if they have the right connection! I would suggest getting a center channel before a sub or surround sound speakers. I have yet to get a sub and i dont think i really need one(i also live on main st, so would prolly disturb alot of ppl).
as for the dog eating everything i would suggest getting speakers that you can hang or put up so the dog doesnt have a chance to get them or knock them down.
if you can afford spending $398 or more by the end of the year, i would check this
crutchfield deal out. for about 400 you could get a full set of speakers! Whatever speakers you end up getting just make sure they are video shielded, otherwise you would be wasting your money if you are trying for a good inexpensive system.
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"Parents have forgotten how to be parents" Aaron Lewis
"Get your ass back here, your a white boy walking thru the ghetto" - at the end of a bachalor party said to the bachalor while walking home.