PSB Image B6 & Denon AVR-4306

I'll give you my biased and mostly uninformed opinion.

First, I'm not a fan of the PSB sound based on my limited listening of them. The only potentially unbiased opinion is that they are 6 ohm nominal speakers which will be a little harder for the amplifier to drive compared to some other speakers. The receiver may be "high current" and rated for 4 ohm loads, but I can't seem to find anything on the Denon website and the ratings in the manual only indicate 6 ohms. My preference would be to have a receiver that was 4 ohm capable for a 6 ohm nominal speaker.

It looks like the PSB speakers that you're interested in are about $500 so keeping that in mind I'd suggest looking at the Focal 705v speaker or even the 706v if you can wrangle a few more dollars. They are available at Music Direct, but I'd suggest trying to find a local dealer to demo. These two models have the same tweeter that goes in the $3,000 836v model that I have.

Another option that I would suggest is to consider a Monitor Audio product. The BX1 or BX2 are a great place to start. The PSB speakers that I listened to were more expensive that the Monitor Audio speakers that I heard, but I was much more impressed with the Monitor Audio product for the price (i.e. value).

I should probably clarify that I'm not saying that PSB isn't a quality speaker, just that I didn't appreciate it's signature sound. I would describe it as dull, but others might consider it to be warm. My Focals are detailed to me while other consider them bright.

Elizabeth has a good point about looking for a great buy. I'd suggest doing this as well while keeping in mind that it's not money well spent if you purchase a speaker with immediate plans of a future upgrade. Try to get something that you'll be happy with for a while or at least plan to use as rear channel speakers in the future.

I'm not sure what you end goal is for a system, but my father-in-law has Focal 706v speakers connected to an Onkyo 606 receiver and is set for life. A friend of mine has Focal 807v speakers with an Integra 40.2 receiver and I think he's happy for life. I have Focal 836v speakers with an Inteegra 50.1 and I'm pretty much happy for life when it comes to speakers. My point is to make sure that all of your audio purchases are made with the future in mind rather than just getting by for now.