Cool I have 2 gales as my surround speakers, get whatever cable you can afford, obviously spending £50 on cables for £50 speakers is a waste of time
I usually bi-wire with decent mid range cable, £3/£4 a metre will be absolutely fine
I actually use better quality stuff on my centre and fronts and cheaper stuff on the surrounds as obviously they need more cable...
To be honest unless you use really cheap stuff you won't notice a massive difference, a but like HDMI cables, no point spending stupid money unless yiu have an awesome set up