If u are able to get your hands on Altec Lansing's ADA Series. They have enormous bass and value for money(i believe it's altec's best series). Unfortunately one thing is that it kind of a troublesome speaker because of the Spdif output. But normally its powerful enough to run as a 2.1 speaker without 4.1.

yea i'm using ADA880 currently. Been using it for like 8 yrs and still no problem. Till these days i still dont dare to switch the bass to max because its far too high. Even running at 3 i find it already too annoying. Well as mention if anyone who seeks budget value speakers , try to look for a 2nd hand on ADA series(applies to 880 and aboves). The only thing is you need a tv decoder card to have a spdif output to get the surrounds working.