Whether you are a videophile or not you should decide based on what you prefer.
If you like and will use the extra features of the VT, then go with that one. If you want the largest picture for that big screen visual, then go with the 60.
Panasonic plasma's are very good in regards to picture quality, and once you get either set in your home you will love either one.
That's the main thing to remember, either TV will look great, so don't sweat it so much.
I bought my dad a more basic Panasonic 60" TC-P60S30 last spring and the picture is great. Compared to my 8yr old Sony projection LCD that basic plasma has better black, which translates to richer colors and better contrast.
The main thing I don't like about that plasma TV is the semi gloss screen. There is too much reflection when watching during the day. My LCD has a matte screen and I don't have as much daylight so nearly zero reflections.
I don't know if Panasonic has fixed the "buzzing" issue that is much too common on their plasma sets, but that would be my biggest concern. When I bought the S30 for my dad there was no buzzing. It's now nearly a year old and in the past few days the dreaded buzzing has started and it's quite loud.
I'm hoping I'm within the warranty so we can get this fixed. But, I'm concerned that it will come back unless Panasonic has really corrected the flaw.
I just sent them an email and frankly even if I'm only a month or so out of warranty I'm going to insist they fix it under warranty given how extensive and pervasive the problem is. Judging from internet sites the buzzing problem is quite common. It may not affect all sets, but it does seem to affect a LOT of their sets, so much so that there really needs/needed to be a voluntary recall to get these sets fixed.
Back to your decision, again, pick the size that best fits your viewing area. Either TV will look great once you get it home and start watching, so much so that you will quickly forget the tech specs you are now sweating.
Just make sure you go through all of the settings to get it looking good for your environment.
And please, turn off all the silly circuitry that makes movies look like video. I absolutely HATE the removal of blurring that is actually part of the natural way we see things in real life. Wave your hand in front of your eyes, notice how there is a natural blur to motion. To me that looks much more natural than the blur removing circuitry and algorithms that cost extra. I have NO use for that.