Solved comparing sound cards and speakers

I'm NOT a gamer. If I upgraded for Soundblaster Live 5.1 and Logitech Z 340s to Voyetra Turtle Beach Santa Cruz and Logitech Z 540s would I hear a noticable difference?

 

The SoundBlaster is better than the Turtle Beach IMHO. The Z40s are certainly better & not a bad deal for $80. If you can scrap together another fifty go for the Z560s. Much better speakers for $130.
Other than that it all depends on what you use your PC for. The 560s will make it sound like a theater if you watch DVDs on your PC. You'll like either upgrade for CD music. If CD music or MP3s are your passion you may be able to jack your sound card into your home stereo. I can't remember what jacks the SB Live has so I'd have to check otherwise it's just like adding any other auxilry item to your stereo reciever.
Nothun beats hearing old bucket hand drop the beat on some good speakers or headset.