How about Altec Lansing MX6021 bro ?

Do consider Altec Lansing MX6021 too bro..

C3 has the biggest sound IMO, followed by s330 and lastly M10.. but C3 need proper dac or sound card to perform at its best..

But, for the price u will never go wrong with M10 .. Plus, for some people M10 is has comparable sound quality with M50W but with a light bass.. ( the subwoofer is actually a mid woofer )

I vote for M10 for overall balanced sound..

For me , adding a decent sound card or dac should be your top priority after getting new speakers set ..

Changing cable do make the sound quality better, but not night and days difference.. For some, they might not hear any differences at all unless you are being critical..

You should also consider Swan D1080-iv speaker bro..

You can consider Swan M10