in general, i don't spend a lot of money on wire. i have never spent more than a hundred on interconnects and speaker wire can be had for reasonable money. i bought audioquest ruby for about $100, my AQ type 4 speaker wire was thrown in gratis with my adcom 555II amp. i won a $1000 pair of acoustic zen silver interconnects and they DO sound nice, i recently compared them to some other not cheap wire but that didn't come that close, exhibiting less dynamism and detail.
i tried out wire between my dahlquist electronic xover ant the amps to the speakers. with NO expectations it was no contest which pair went to the amp driving the rogers LS3/5As and the infinity monitor JRs that i used for subs.
you won't hear much difference while using a receiver unless it is a B&K or similar. separates begin to be better sounding as they are purpose built and not usually mass market. it is a fun HOBBY and you will learn as you go. wire won't magically transform your system into ten times its worth but there can be some pleasant surprises.
the type 4 AQ speaker wire is a real true bargain. when i swapped it in to my system, i first though the bass had diminished but NO, it was free of overhang and went deeper as well than my previous monster twin lead 12 ga.
i lucked out a few years later when my stereo salesman friend aske me if i wanted the 20' pair of kimber 8TC for $50. uuuuuh YEAH.