New subwoofer on a very tight budget for my PC gaming/HT rig

So the subwoofer that I have been using since 2004 has finally died on me. Have been using this Creative GigaWorks S700 560 Watts 5.1 Speaker Came back after a week on vacation and the apartment smelled awful, later came to find that my sub was no longer working (found it odd that it died during a week with no use) Anyways, it's time for a new one.

Now I mainly use my setup for PC gaming but also watch the occasional blu-ray/dvd on it. I still use the old creative speakers (7 of them) on a SONY STR-DH520 7.1-Channel 3D A/V Receiver hooked up to the GeForce GTX560 Ti on my PC. I checked out the specs of my old sub and it said Subwoofer RMS Power: 210 Watts // Frequency Response: 25Hz - 40,000Hz. Now I am not very knowledgeable with specs of subwoofers and what a lot of new ones have to offer, but I am trying to stay around the $100 mark. How would something like this compare to my 8 year old sub (even though the old one seems to have more power). I am also willing to pay a bit more if you guys have a recommendation from this list on Amazon. I only say Amazon because I currently have free 2-day shipping and would like to get a new sub in ASAP because gaming/watching movie simply sucks without bass. Unless you had something in mind on another website that offers relatively fast shipping, but I figured Amazon would suffice since I don't feel like paying all that much anyways. Thanks in advance!

Edit 1: Also, I've noticed that a lot of newer subs have a L and R line in, but my receiver only has a single subwoofer output. Would I just buy a single RCA cord and use maybe the white/L input and connect it to my receiver that way? Until now, I had my subwoofer connected by using a 3.5mm to RCA splitter and just used the white RCA for my receiver's output.

Edit 2: Been looking at older threads... this is really stretching my budget, but if it is a LOT better than the main one I am considering, then I might go for it, opinions? BIC VENTURI V1020... there is also this one which has a better price+shipping cost (Amazon Prime eligible) Pinnacle Speakers SUB-SONIX 10-200 10-Inch
Edited by helba187 - 8/19/12 at 9:29pm

Also, keep in mind that I just don't want to get something that is inferior to my old sub. If even the Polk Audio PSW10 is better than what I had then let me know and I will prob just go for that, but if you think I really need to spend an extra $50 to get something equivalent or "close to" then I am willing to do that. Or, if the extra $50 is going to get me something that is noticeable much better than what I had been using the past 8 years, then I might be willing to fork out the extra cash for that as well.

It does not power the speakers. How does it compare to my old sub? The Pinnacle Speakers SUB-SONIX 10-200 10-Inch had more wattage, does that mean it's better than the Dayton? Also, how would I hook up a sub that has a Left and Right audio in when my receiver only has a single audio out for the sub. When I try looking for an RCA Y cable that is all I am able to find is 2 male RCA's to a 3.5mm miniplug adapter which would obviously not work.

Anyone? :/