Got my very first system. What's my next move?

Hey everyone,

First of all, I'd like to thank all of you who stopped me from selling my father's 10 year-old McIntosh components. I've talked to some other audiophiles and dealers as well, and it looks like I'll be keeping these babies for a long time.

My first system (mostly given by my father), consists of:

McIntosh MC7300 power amp
McIntosh C40 preamp
McIntosh MCD7008 CD player
McIntosh MR7083 Tuner
Totem Hawk floorstanding speakers
Siltech MXT London interconnects
MIT AVt3 bi-wire speaker cables

Also please keep in mind that my current room is pretty small (10' x 14').

My question was, what is my next move from here? I currently have about $1500 saved up for A/V spending, and if I wait until september, it'll be up to $2500. Many have suggested that I purchase a subwoofer (REL Strata 3 or 5) and some have suggested I invest the money in a good power conditioner (Shunyata something...). I'd like to hear some recommendations from the real audiophile group (the A'goners). Please help :)

Oh, I use the system mostly for music by the way. I'd say about 70/30 music/movies.

Thanks in advance,

Seong