My $.02 (did you really think I could stay away from an analog thread?!?!)
Hi Dave, I just popped over to your system to refresh my memory on what your analog rig is looking like and I would agree, the SDS is clearly a sonic improvement in making the VPI more "pacey" (is that even a word??).
Hint. Look at the drive motors offered by Teres, for example.
The very low torque motors that VPI uses give the table a dark and deader-than-life sound. The SDS seems to improve that situation a bit. Still a higher torque (non-VPI) drive is even more desireable, IMHO.
As far as your tonearm/cart combo is concerned, I think you're doing pretty well there and I would suggest that you could get substantial improvement only of you spend substantial buckeroos on a ZYX Universe, R1000, or R100 model. I use an elder cousin of the R1000, the Accuphase AC3 and it is fast, neutral, and honest in reproduction. Since you're an ML owner, I'm sure you can relate to the description
.
I apologize in advance to those with wood-bodied carts from Benz, Grado, or Koetsu. Yeah, they sound warm and fuzzy, but it's not the truth. I've had a few of those and I know it's intoxicating, but in the end the truth wins out, IMHO.
As far as phono stages go, I would agree with what has been said. You could indeed do much better than a stock ARC PH3. I know. I had one for a brief period of time. ARC tried to correct some of it's problems with the "SE" edition, but in my opinion it was a lost cause. There are 2 phono preamps that have not been mentioned thus far that I think would be excellent choices, the Art Audio Vinyl One or Art Audio Vinyl Reference (two very different designs, but both are sonic gems). The cool thing about either of these is that they are standalone phono stages with volume controls. So they need not go through a line stage.
Also, if you are not allergic to solid state, I would suggest my current main squeeze, the ASR Mini Basis Exclusive (new AD 843SQ Mil spec chips). This phono stage may be solid state, but it has a heart and soul of vaccuum tubes. It handily beat out my Melos Reference Phono which was a Class "A" component in its day. It's quiet, clean, throws a sound stage wider and deeper than anything I have heard, has iron fisted authority in the bottom end, has the sweet and supple midrange of a great tube preamp. Go figure. Also, with up to 70DB of gain, it'll handle any cartridge ever produced. Even if it has only .05mv output!
Well, that's my $.02 for now.
Enjoy the hunt, Dave!
Cheers,
Ray