JBL Studio 570s were over-acheivers. My guess is that the Ascend 340s would be a lateral move. I would save up for something that is sure to be a perceptible step up. Sorry to tell you this, but it isn't going to be inexpensive. I would be looking at something from Arendal, also the Polk R700 with L400 center, SVS Ultra Evolution, KEF R series, Philharmonic HT series, something in that category.