I plan to upgrade a small media room (11 x 12 x 8) with some new equipment. I have budgeted around $500 for this upgrade. Which uprade would you guys recommend first? The sub i'm using is about 10 year olds, MTX PSW101B 100 watt 12". I have it in a corner as there is almost no other option in such a small space. I like bass to sound tight and detailed so I have the gain level about a 1/4 of the way up, any higher and it starts to sound "boomy". The room is carpted and is enclosed square shape. Thanks for reading.