from what you have said, it sounds like you are looking for a fast and neutral cable that has good externsions at both ends, but with a warm midrange.
couple of points... imo, no cable really fits into that description. cables fall into warm/bloomy or fast/detailed camp. granted there are some cables that sit inbetween or close to borders. tryin to find a warm midband yet extended extensions ( ie bright top, good bass, and warm midrange) really doesnt fit.
cables should be treated as components but they are also gear dependant. in other words, some of the characteristics you are lookin for will have to come from the matching of your gear and also speaker cables
dependind on your budget, i would suggest the xlo signature II or the straightwire crescendo and cardas neutral speaker cables and listen
they are not bright cables but very truthful to the components they are connected to. from their you can get a baseline... if your system sounds too bright add a slightly warmer cable(one set) in between the pre to amp ( the discovery plus 4 is a cables that stradles the line. it is a neutral cable with a slight tinge of sweetness at the top but still gets the details ). and if it is still to bright add a second set of discoverys. and if still too bright, try the cardas golden cross ( very warm cable).
you will have to experiment to find the optimal set of cables.
i have found that most really good cables fall into the $700 and up (new retail)/ $325 (used) price range. i have yet to hear a "killer" budget cable ( the used discovery plus 4 is one, imo)
also, try to stick to major players. if you deceide to sell, you can generally break even and sell them quickly. a unknown no matter how good it, will take a beating. i would only suggest a new unknown after you have played around with enough cables to know when you hear a great one and they offer a solid audition and refund program and you plan on keeping the cable for a long time.