STOP!
A little care is needed, when shopping for speakers to use with a computer...especially, if you're considering "audio" speakers, instead of "PC" speakers...
A mate of mine a few years back, had a pair of small, but incredibly heavy (and truely awesome sounding) hi-fi speakers. He had a separate hi-fi amp for them too.
He had the PC switched off...placed the speakers where he wanted them...about 6 inches each side of the monitor, wired it all up..switched on.
Two huge purple "tie dye" pictures now filled each side of the screen, touching in the middle. Audio speakers aren't always magnetically shielded, like PC speakers are.
It took days for the screen to even begin to recover...luckily the monitor had a degauss button, which seemed to help a little. The monitor picked up temporary hints of purple, even when the speakers were 15 inches away...
This is probably not a concern for you, if you've got a LCD monitor, rather than the old "CRT"(Cathode Ray Tube) type, but certainly something to be aware of.