Lee, if you listen at times to classical music that has substantial very low bass content(e.g.,pipe organ)you'll find that a good sub, such as the one that you mentioned, is of great benefit. Again, I've found that the M22/EP500 combination is excellent for such music. The cost of stands can run anywhere between zero(if you use something already available)to $1,000, but suitable ones are readily available for around $40 and this shouldn't be a major factor in your purchase decision.
As to the receiver, the 2310 would be a fine choice, and I'd suggest that the Onkyo 707 also could be considered. Because of the general excellence of modern HT receivers, amplification is an area where an emphasis on low cost can be implemented without affecting overall system performance.
