Ok. As always I have a few more questions, but only because I trust your advice. A complement to you. I guess I should go with one sub and I can always match that sub with another in the future when I have saved up some more green. In the mean time I am looking for a sub with a high quality low pass and high pass filter so that I can no longer run my mains full range and have the sub pick up the harder bass frequencies. Considering my mains, 602's, are good till around 42 hz -6db I figure It would be best to relieve them right around 55-60 hz. I think I will have around 600 to spend on a sub, which I wil probably do used and cross my fingers. I think used audio is a great value as long as you are willing to sacrifice a few blemishes. I hope by going used I can get a sub that was atleast a 1,000 new because it is widely published on this site the importance of a good sub. Unless you have strong reccomendations for new subs ni the 600 and less range.
The sub I get is intended for two channel playback only, while I am not sure such a sub exists, my main concern is the musicality, tightness, and quality of crossover. Thereby, I am seeking a sub that would perform more hifi than hometheater.
Thanks again, as always, you all have been a big help