I'm looking for bigger and higer power speakers for my computer. Does Anyone know what brands are best suited?

Hello there and great question.  Having great speakers for your computer makes whatever you are doing on the computer (like watching movies, listening to music, gaming, etc) so much better and more fun.  I would suggest speakers with a sub woofer, this way you can really feel the bass in all the sound.  Sub woofers are fun but if the volume is up high enough it will cause your room to start shaking along with it.  Altec Lansing is a well known brand for high quality speakers and headphones, they provide a nice crisp sound.  The speakers and subwoofer can be found online for about $50.  I personally have the Logitech brand and they work great, probably not as great as Altec Lansing but still is awesome.  Gives me great sound quality and shakes my room up a bit.  These speakers range from $30 to $100 depending on the system you get.  You could get the system that comes with 5 speakers and a subwoofer or just a 3 piece set.  Hope you find speakers that you enjoy.