I've heard the Bose and they're ok. I'm not familiar with the Creative Labs t40s.
I've owned a fair number of speakers and frankly most computer speakers are garbage as they lack any bottom end and wind up sound flat and tinny.
Problem with both of the models you've listed is the lack of bass. You need some type of subwoofer to grab the low end and unfortunately the models you've listed just won't do that for you.
Now if you love the midrange either pair will do the trick.
My best advice? ... if you can afford to spend 50% more the I would go with these:
Unfortunately I just don't have room to add a sub. Plus i live in an apartment building that isn't exactly sound proof so I want to keep my neighbors happy, which is why I'm only looking at 2.0 options. I know the sound won't be the greatest, but looking to find out which of these two sucks the least I guess. Or I'm open to other 2.0 systems under $150
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Between the two I would go with the Creatives... from my listening experience Bose is all about brand recognition and less about sound quality and fidelity. Being that you can't go 2.1 I think you will get superior bass response and overall performance from the T40's. If your budget was higher you would have a lot more choice but within the price range the T40s are very well reviewed (e.g. Creative GigaWorks T40 Series II Macworld review) and Creative has been in the PC audio business for decades.
Why not M-Audio AV30 monitors? They've gone on sale at Future Shop for $79.99 (Reg. $99).
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