There's a big difference between a HK receiver and a Technics. HK has always been high current and discrete circuitry. Not sure how true to this they stayed on their HT receivers but the older stereo beyond a doubt. I can be certain but I'd bet the Technics is not discrete and I'm sure it's not high current. Keep in mind there would have been a big price difference as well. Also, keep in mind it takes current to drive and control low impedance speakers.

The Technics may give sound but I doubt it would drive the PSB anywhere close to their potential.

Don't count out all Klipsch. Some of the Best Buy stuff isn't so good but they do have models that are. Unless it's the horn sound then you may have an issue with Klipsch in general.

I understand they aren't that attractive but you may want to look at Cerwin Vega. JBL probably still makes 8 ohm speakers. I just don't know of many efficient budget speakers. For just background I'd just watch craigslist for something cheap and decent.