Amp for Thiel CS2's

I've read Thiels can be hard for amps to drive. I have a chance to get these speakers cheap (under 300) for my computer room and wonder if I could get away with using an old Pioneer SX 780 at 45 wpc into 8 ohms receiver to drive them. Listening levels here are moderate only. How this receiver would react to a low impedance load I don't know. If need be I could get an integrated as I certainly have plenty of tuners laying around. I don't want or have enough room for separates nor do I want to spend much money on this as it's for background music only. Thanks for any help.