Sealed sub's typically work best in conjunction with Totem products. The first choice would be any sub by REL Acoustic or designs similiar thereof (Mj Acoustics, Vandersteen, ACI). A great cheap alternative would be an Onix UFW-10.
Totem just released the "Storm". Thus far I have not had a chance to hear the unit, and I haven't heard from anyone who has experience with this new sub.
The Lightning and Thunder, while good subs in their own right, are more 'me too' products. In other words, they would be a great match, but you can do better for the money.
To re-itterate what's stated above, I would go with a high quality REL sub and call it a day - although there are a few aforementioned (and probably some I failed to mention) that are worth investigating as well.