Baby steps. new power supply first

I'm a fanboy of Seasonic. Their X series or their Platinum series are what I'd look at. Both are the same thing, the Platinum series are just a little more efficient and thus a little cooler and a little quieter. In particular if you get a larger one than you need and set the fan to hybrid mode, it doesn't engage at all until maybe 20% load. Well get like a 1000 watt PSU and you probably will never have it engage unless the system is really heavily loaded.
 
Of course that will blow your budget, but you can get one of the smaller X series ones in the money you wish to spend and they are very good, and have very quiet fans. They put good fans in their units, and connect them to a good fan controller.

Thanks .  BTW  I have not had 1 freezeup since moving the computer back upstairs.  Maybe I will  have to spend a little more than 150 for a power supply.

There are some reasons to spend up and get a better PSU:
 
1)  Greater efficiency for less heat and noise. While you save a very trivial amount of energy with higher efficiency PSUs for just one computer, it can make a difference with the thermals. Any waste energy is by definition going to heat, so the more efficient the PSU, the less heat it generates. Going with a platinum PSU as opposed to a bronze one will help a bit with noise.
 
2) The better PSUs usually have better fans and fan controllers, which end up meaning less noise. They have better componentry all around, but in particular the fan and controller matter for sound. One of the reasons I like the Seasonics is the excellent San Ace fans they use.
 
3) Longer life. If you are doing the "upgrade the parts periodically" thing, your PSU can easy outlast anything else in your system. The better the PSU, the longer lifespan it is likely to have, certainly the longer warranty.
 
4) Modular connectors. I find it is much nicer to be able to only connect what is needed. Also fully modular connectors make running cables much easier, since you can run them form either end.
 
In terms of buying a large PSU, that is mostly a noise thing again. What you discover is some of the high end PSUs will shut their fans off entirely for the lower range of operation. So if you overspec the PSU, you can get it to never spin its fan up in some cases. Not saying this is a must do thing, just a consideration. Mine never spins its fan up outside of videogames, nothing I do on the desktop, even Sonar, is enough to make it need to turn the fan on.
 
Another option along those lines, if you system consumes little enough power, is a fanless PSU. Seasonic makes those too, up to 520 watts which is probably fine for DAW use.

Cactus Music
Actually now we have more energy efficient hardware super large power supplies are not even necessary. 
I do like Bob does with my DAW. Nothing goes to sleep unless I tell it to. 
 
I have a few different builds and the PS have been mostly 750. I also have an extra back up DAW that has a 450 Watt and it works just fine. SSD drives don't use diddly squat for power. All my PS are quiet. I have a Sparkle, and the rest are Corsair I've never paid more than $75 for a PS. The 450 was like $40. Your over thinking this. Computer parts will do that to you. 
 
Your specs look like your whole computer is outdated completely. If it is running DDr2 RAM it is not worth upgrading IMHO. 

I know it isn't worth upgrading per se.  My thought is to put the power supply in this case and then use it for my new system.  Hence the term baby steps.  BTW.  this computer still tracks audio very well. I don't use a lot in the way of soft synths.  But ya I want to get a new system.  
    Is this what some of you are referring to?
  http://www.newegg.com/Pro...x?Item=N82E16817151140

Thanks a lot. I have a cooler master mid size case.  several years old.  ATX