Hi there ainsha,
I recently upgraded the cables of both my Q701s. I got the cables assembled by Redco, and I have nothing but praise for their impeccable work. I don't believe in cables improving your sound or adding bass, etc. To me that's just a load of unsubstantiated claims and scientifically unproven and unmeasurable BS, which only benefits the ruthless cable manufacturers that want to charge more than your headphones for 5 feet of cable and a pair of branded connectors.

I went for a great yet very affordable Mogami W2893 mini-quad (15ft), with a Neutrik NP3X 1/4" TRS plug, Redco's mini-XLR TA3FB connector and Techflex PET sleeve in back and white, respectively. Both cables cost me $95 USD including shipping. You can read about the REAL benefits of star quad cable, and the specs of the cable are available, unlike with most of the aftermarket cables that they want to sell you for 3 digit amounts. At Redco you can choose the TRS plug of your preference, the length of your cable, different kinds and brands of cables and several colors for your sleeves.

The 16ft EK500S replacement stock cable from AKG - which is of the exact same quality of the one that comes with the headphones - costs $39 USD, vs my 15ft Redcos that go for $43 USD each. That is a significant upgrade and a very priceworthy replacement for your cables, IMHO.

I think you should certainly read more about the whole cable debate before you spend your money, and you can certainly start by checking out Tyll Herstens' attempt to both measure and hear differences in cables, and most certainly the comments in the thread, that also point you in different directions.

Cheers!
Edited by Zkadoush - 4/14/13 at 7:39pm