I had the Primus 250's, got them in 05 and they have done a nice job for entry level speakers. I found them to be much better in home theater setting then music. I was running them on an older Onkyo system and just recently upgraded to a new Denon. That alone made a huge improvement in sound on the Infinity's mainly because of the newer processing capabilities in the Denon and the same would be true for any new receiver. Once I hooked up the 340's it took the sound to the next level. I can promise you'll will be pleased with the Ascends and hear a dramatic difference.

What type of receiver you using?