Warren,
From my experience I'd say that this is all incrimental. I'm using a Stealth too and yes things do get better again when you upgrade the cable that is feeding it. I would not say that the improvement is as dramatic as when I first installed my Stealth, but it's there. The question is how much money do you want to spend. It seems that there is no end to this power stuff. Don't go crazy with spending tons of money. I upgrade and play with things a little at a time when my cash flow permits.
From my experience I'd say that this is all incrimental. I'm using a Stealth too and yes things do get better again when you upgrade the cable that is feeding it. I would not say that the improvement is as dramatic as when I first installed my Stealth, but it's there. The question is how much money do you want to spend. It seems that there is no end to this power stuff. Don't go crazy with spending tons of money. I upgrade and play with things a little at a time when my cash flow permits.