***I apologize about the horrible topic name -- I was too excited to see some results and forgot to go back and rename it*** I posted topic about a week or so ago, here, and picked up a JBL S-Center and 2 JBL S36s. Needless to say, after replacing my satellites that noticed only 100-20,000, I was very pleased with my purchase. My wife, who is very tentative about spending any amount of money even chimed in to voice her approval. So I'm testing out my new speakers on all my favorite movies, even turned down the sub to enjoy them more. While testing these new speakers I heard a very suspective *POP* from the sub. Subsequently I now receive nothing from it. The sub I own is a Pioneer SV-105 (not sure on the Alpha prefix) a self-powered 100 W sub with a range of 35 -20,000. Now, the warranty on the sub has expired and I have recieved again "authorization" to purchase a new sub, however, I was given the allowance of only $400. I began to research and heard some decent things about Klipsch, Velodyne, JBL, Sony, ect. Then I came across this thread: "What sub did you own before you bought SVS/Hsu?". Edward J M wrote a reply that has made me bound and determined that I must feed my fervor by purchasing one of these coveted SVS subs. Two models caught my eye: the 25-31CS (Sub Only), and the 25-31PCi. I have two questions and both are centering around the 25-31CS. I have no clue about seperate Amps and was wanting some linkage and some prices on some of the more affordable and acceptable models. Second, would I be better off pricewise and performance-wise by just saving and purchasing the 25-31PCi? Also some first-hand experience with this sub is always welcome. Room is (HxWxD): 10x13x20 and is an apartment which may need special consideration when concerning a bass. Thanks ahead and I appreciate all comments, constructive and deconstructive.