[sdiy] One Big Power Supply OK?

[DCMagnuson at aol.com]

Hi List,

My modular has severely outgrown my powersupply, and I really need to add 
some more juice...  I found a linear triple output supply from Mouser, and 
I'd like peoples' opinion:

It supplies the following:
+5V at 6A
+15V at 1.5A
-15V at 1.5A

Is it a good idea to buy one BIG supply like this, or is it better to use 
seperate smaller supplies?  I was envisioning one smaller supply (500-800mA) 
for my VCOs only (for tuning stability)  and this second large supply to run 
most everything else.

My modular has recently expanded into it's 6th frac-rac case, and I'd rather 
not buy/build 6 seperate supplies if possible.  

If I *do* decide on one large supply, I'll probably build it into a seperate 
2U or 3U case with multiple 6-pin DIN connectors on the rear.  I'd then 
star-wire these to each frac-rac case.  The cases will each have a 
Blacet/MOTM style distribution board inside.  Should these individual power 
supply outputs be decoupled with 100 ohm resistors and some caps?  My modules 
generally have decoupling already, but would further decoupling in the main 
power supply be helpful or harmful?

Finally, I use a dirty/clean ground system on my scratch-made boards, and I 
was wondering:  How should dirty/clean ground be tied together at the supply? 
 Can they be hooked directly together, or is some sort of isolation crutial 
here?

Thanks in advance

Dave Magnuson