A 30' run of anything better sounding that the StarQuad is going to be expensive, unless you try the Home Depot cable and find that it really does improve things for you.
I replaced StarQuad 4s11 in my system with DH Labs Q-10 and it is definitely better, but I needed only 8' runs so the difference in total price wasn't astronomical. I think the Q-10 is wonderful stuff for the price and was worth the $200-something difference (buying it used) but 60' of it is going to cost you $600, unterminated. It is considered a high-end 'bargain' but without any idea about the rest of your system or room I'm reluctant to recommend you take such a leap.
Anything other than the Home Depot cable is going to be sort of a shot in the dark since you're not going to be able to easily find used cables of that length that would make it reasonably painless to experiment. Of course, the thrill of the unknown is part of what's intriguing about fooling around with this stuff.