Both Bomarc and Trelja offer good advice. To expand on Bomarc's comments, bear in mind that doubling the amplifier power only results in a 3db increase in SPL, which is not a major increase in volume. If 80 wpc isn't enough for your PSB Golds, you should be thinking in terms of a 300 wpc power amp. But power isn't the only issue: quality is the other factor. The PSB Golds are pretty damn good speakers, although they are inefficient (their published efficiency rating is incorrect), and they deserve to be powered by a high quality preamp/power amp combo.
Best inexpensive integrated for PSB Gold speakers.
I just bought a pair of PSB Gold speaker for a system where I currently have a NAD 317 that puts out 80 watts a channel. I love the 317 it has been a wonderful amp with plenty of power in the past, but I would like to get something with more power/current. I have heard great things about the NAD 370 with 120 watts. Anyone have any suggestions on what these speakers need or a decent integrated that I should look at besides the 370? The 370 has some great reviews but I'm not sure it has the power. Thank you for your time and feedback. All opinions appreciated.