looking for some good bass speakers and a great subwoofer fo 600 bucks

[randomgibberish]

well I've been using some altec lansing surround sound speakers running on real tek hy tek operating software and it can handle alot of bass it's just sometimes I need to edit the pitch of songs on lower ghz songs. So on the songs I look at with the extreme bass boosts I've been seeing alot of quantum speakers and subwoofers I wanted to know if there are also some that are configured for a computer or maybe have an adapter so a laptop could be plugged into the set to play songs and also wanted to know good softwares that I could bass boost some of my mp3's that I own. thanks in advance.

 

[greenwizard]

Adapters
http://www.compusa.com/applications/SearchTools/item-details.asp?EdpNo=4115644&CatId=4261
http://www.compusa.com/applications/SearchTools/item-details.asp?EdpNo=402124&CatId=2769
List of external adapters
http://www.compusa.com/applications/category/category_slc.asp?CatId=4261&name=External-Sound-Cards
Decent subs
http://www.crutchfield.com/p_108PS210BG/Infinity-PS210.html?tp=187
http://www.crutchfield.com/p_732ESWM6/Energy-ESW-M6.html?tp=187
Bookshelfs to match
http://www.crutchfield.com/p_108P162BG/Infinity-Primus-P162-Black-grille.html?tp=186
Or a couple floorstanding
http://www.crutchfield.com/p_108P362BG/Infinity-Primus-P362.html?tp=185
http://www.crutchfield.com/p_107TSI300C/Polk-Audio-TSi300-Cherry.html?tp=185
The polk floors & energy sub would be a sweet combo!
http://www.crutchfield.com/p_107TSI300C/Polk-Audio-TSi300-Cherry.html?tp=185
http://www.crutchfield.com/p_732ESWM6/Energy-ESW-M6.html?tp=187
Wire and Cables
http://www.crutchfield.com/p_703SUBA2M/AudioQuest-SUB-A-2-meters-6-6-ft.html?tp=2452
http://www.crutchfield.com/g_22111/Speaker-Wire-without-Connectors.html?tp=3063
http://www.crutchfield.com/g_22111/Speaker-Wire-without-Connectors.html?tp=3063
Software
http://www.dexster.net/
http://www.fabfilter.com/products/pro-q.php
http://freemusicsoftware.org/category/free-vst-effects-2/eq

Edit:I know your probably brand specific,but if you don't mind doing some installing and wiring you could build a very nice setup.I was hanging out with a friend yesterday and he reminded me about this website.
http://partsexpress.com/
You can make some nice speaker setups from scratch.They have almost anything you can think of to do builds.If I had 600 to play with I would do that.Of course saving some for the external sound card.
I would pick out a sound card first,then work from their.