Well, here is my newbie system. Put together on a budget, almost every piece was bought used. Actually "preowned" sounds better. The tonearm and cartridge were new. Now I guess that I am in tweak mode, my next purchase will be some kind of power conditioner, and some vibration/isolation devices of some sort. My room is over the garage, so its a suspended floor. The TT is sensitive to noise in the room (usually my 4-yr old child), so I've got to work on that. Also I have a pesky ground loop hum through the TT that needs work. Please comment on my stereo or offer any advice on how to improve it without breaking the bank!
System edited: The stylus has been damaged on the AT-150MLX, so after much hunting I was able to find a Supex SD-901. Soundsmith rebuilt it with a new stylus and cantilever. Switching to this MC cartridge has eliminated the ground loop hum.
For cables, I have good interconnects. Power cords are stock, and I am planning to upgrade those. I've done some research on room treatments, and have thought about some DIY panels. Any suggestions on an easily available material to use?