OH MY GOD!
I cant believe I let this one slip by.
I love my 5300's. They sound awesome. There is a reason they got the THX cert. The sound is loud and clean on all levels, Bass, Mid and Treble. Dont know if they are shielded or not, but I can move mine right next to my CRT and not see any distortion. The satellites are heavy and sturdy, they provide good Mids and highs in all my games and music.
The Sub is boomy, but you dont need to stuff junk in the ports. Just use the Windows Volume settings to turn down the Bass. Keep it well below half-way on the slider. Let the subwoofer do its job.
On the speaker control pod I leave the sub setting down really low and it still sounds great.
Also, you cant beat the price at Newegg right now. Shop around. You can NOT find a THX, 5.1, 280 watt system for anywhere near 134 dollars.
EDIT: See, no interferance. The blue effect is from my camera, not the speakers.
http://pics.bbzzdd.com/users/shortylickens/MonitorCRT.jpg
EDIT 2: Nevermind, this pic is better. God bless indoor flashes!
http://pics.bbzzdd.com/users/shortylickens/MonitorCRT_2.jpg