I have a Pioneer VSX-D511 home theater reciever. After recently upgrading my old HTiB (Kenwood Vr407) speakers to Paradigm Atoms (x4) and a CC-170 I realise I need to upgrade my crappy sub. My reciever has a crossover of 100hertz and in addition to running the speakers "large" it has a "Sub+" setting that allows the x-over bass from the center and rear speakers to be sent to the subwoofer while allowing the fronts to focus on their "large" signals. Thus I was thinking of running two subs: *A sub to connect to the front L/R mains, via speaker-level connectors, to improve stereo CD listening and give a little more 'Oomph!' with HT. *A second larger sub for handling the .LFE channel for DVDs as well as the X-overed bass from the center and rear speakers. Given my speakers (Paradigm Atoms), are there any good suggestions for this set-up, or will just setting all my speakers to "small" and using one subwoofer sound just as good? I've been reading some posts and think i might try an Adire Audio Rava subwoofer to add to my Atoms (and telling my reciever I have 'Large' mains), and a "rattle your fillings loose" super-sub such as an SVS PC+ 46-16 or an Ultra to add to my .LFE output. Any better suggestions for my $$$?