hi all i've been preparing to buy the servo-15 for a year now, (there's allways something more important to buy, before a behemoth sub...), and now there's 2 more subs in paradigm's arsenal. the sysemic 12 and servo-signature. the signature is too expensive (probably, didnt see it yet), but what about the 12? is it suposed to be a more compact design than the servo? thanks!