New to this site!!! I've got a 5.1 home cinema. I'm using a Denon AVR powering 5 vintage Altec Lansing Bookshelf speakers rated at 100w rms and a self powered JBL sub rated at 100w rms. Really happy with the sound from the 5 Altecs but wanting more power and more low end than what I'm getting from the JBL sub. I'm getting some annoying port noise with the JBL aswell. The frequency response of the sub is 35 - 150htz. I'm wanting to go for something in the same relm as the B&W PV1 which is enclosed with no port. It offers 400w rms & 800w peek. Due to having no port it is immune from rattling noises which I get from the JBL and it will go down to 7.5htz perfect for explosive films. However I expect there is competition out there at a similar price which is just as good. Can anyone make any recommendations?