Just for the sake of the "one great cable" argument...
If you have a brand you like a lot, I think it's OK to buy one pair now if you think you might be able to budget for an additional pair in the reasonably forseeable future. For example, I'm a big Kimber Select person (not trying to shill for their products; just providing an example).
I bought one pair of Select 1036's, then built the remaining cables in the system over the course of 18 months. For me, that was better over the long term than being somewhat stuck with mid-priced cables I wasn't really happy with.
If you have a brand you like a lot, I think it's OK to buy one pair now if you think you might be able to budget for an additional pair in the reasonably forseeable future. For example, I'm a big Kimber Select person (not trying to shill for their products; just providing an example).
I bought one pair of Select 1036's, then built the remaining cables in the system over the course of 18 months. For me, that was better over the long term than being somewhat stuck with mid-priced cables I wasn't really happy with.