These have a reputation as great cheap floorstanding speakers for music lovers, performing way above their price point. As three-way, four-speaker towers almost 90cm high, they're also good for home theatre. They were designed by probably the world's best-known speaker designer, Andrew Jones, before he moved to Elac.
I have not tried them, but know them by reputation in the hi-fi world, and the price caught my attention. RRP seems to be $399 each. Of other retailers, Melbourne Hi-Fi seems the cheapest at $698 a pair.
"The Pioneer SP-PK52FS breaks new ground for quality sound at a budget price." - CNet
"If I were new to this hobby and wanted to try my hand at building a home theater but didn't want to go broke should things not work out, I'd start by taking a serious look at the Pioneer SP-FS52 floor-standing loudspeaker." - Andrew Robinson, Home Theatre Review