If it were me I would live with what you have until you can move to a high end speaker manufacturer. The Studio Series is solid, it's certainly an improvement over the monitor line but it also shares some issues.

Sounds like you have a subwoofer so I would be looking at standmounts with a glorious mid-band and high frequency response over bass. The Reference 3a MM De Capo or The Audio Note AN K SPe represent two of many very good standmounts that are a significantly LARGE step up from what Paradigm is making...both offer up far superior high frequency response without the etched treble and the "handoff" between drivers is much better executed.

You'll find bass response from these standmounts to be very good in their own right as well. The AN K has more dynamic impact - If positioned in a corner they are rated at 93db sensitive 8ohm and 36hz-20khz - close to a wall not in a corner your looking at 90db and 50hz - 20khz. The De Capo has a sweet balance in the mid band and offers a huge scale as well. The De Capo goes for $2500.00US and the AN K goes for $1950.00US.

I would run a better amp than the Denon with any of the speakers you're talking about. After listening to the Denon 3803 the other week, I sufffered sticker shock. It was hampered by very poor dynamic impact and a totally lifeless and unengaging sound to my ear. It sounded like musicians put their hand in front of their mouth..none of the wetness and detail that should be there. The amp section is weak in most of thee devices but the preamp is the culprit.

For movies it was not much better - for the money I'm not surprised they keep trying to fix it with the new number 3801 then 3802, 3803...three times is NOT a charm it would seem.

At least look for a used power amp. You can get Rotel or Adcoms for under $400.00 used to help out...preferably a preamp from somebody else as well.