Pass amps: newer xa30.8 or older xa60.5 ?

I second the notion that the .8 is a significant upgrade over the .5

I have heard the Matrix series driven by a Quad II at 15W,but I believe that they do like the power.You might wait and look at 100W+.After having a discussion with Kent @Pass Labs,I have come to understand that there is no jump between the .5 and .8 amplifiers (completely different circuitry.
My advice would be to hold out for more money and power.Contact Reno HiFi,as they have a 15 day audition period.You will still be responsible for shipping,but the expense is significantly less.

Acurus and Teajay, okay I hear what you are saying, that you feel the .8 is a signficant upgrade over the .5, but I am not comparing apples to apples. I'm comparing the 30 watt stereo single chassis .8 to the monoblock .5 which has more power and benefits from the supposed advantages of monoblocks.

Still feel the same way?

Elixir,
I haven't spoken to Kent about the .8 series. But in the past he has suggested the AB amps for B&W speakers. I've had my speakers for about 20 years since they were new, but I won't keep them forever.

I'm not actively looking to make a purchase anytime soon, I am just wondering about the comparison, because the 2 models are almost exactly the same price.

You're probably right about the power. The 100 watt monoblocks are probably the better choice for me.

In the meantime, I love my x250.5 and probably shouldn't even be thinking about the others. But I can't help it!! :)

Kent's advice has always been right on the money in my experience. I would be curious about his impressions, although your previous conversation suggests he may recommend the higher powered option.