This is a great site, Chris! I've been reading it for a while (lurking about).
Here's my "deal:"
I'm the current owner of an Isomac Tea. I was an "early adopter" of the Tea after using a Silvia for a bit (which was a HUGE improvement). I've also roasted my own coffee for a long time. (basically another GEEK! :D )
Anyhow - I had my heart set on getting an Andreja Premium from Chris last week and was all set to pull the trigger. Then I started looking seriously at the S1.
Yes, it's more money - but I truly believe that with this machine and my Mazzer Mini - I'll be set for many years. Plus, the quietness of the S1 is a HUGE deal (my wife, our 1 yr old and 3 yr old get tired of my noise at 5am).
The problem is that I'm just NOT a handy guy. Ask me to cook, comment on wines, wrestle with my boys - no problem. Ask my to plumb, or wire electrical outlets and we have "issues."

I've heard that the John Guest fittings that Chis sells are basically idiot proof. Can anyone comment on this?
Also - I have 20amp circuits in my kitchen, but 15amp plugs. Can I switch the outlet to 20amp (for the S1) and still plug my 15amp Mazzer into the 20amp outlet? I looks like it would fit and it would certainly seem safe to me, anyway?
My only other concern (after flooding our house and electrocuting myself!) is that I JUST got a new 58mm "crotchless" PF from Chris and a matching Espro tamper (LOVE it). It sucks to have to basically waste those with the S1. I suppose e-Bay might be an option...
I would get the S1 and the filter kit you all recommend at the same time. Is there a requirement to purchase an "additional" plumbing kit or anything? I don't see one for sale on Chris' site; and since I've never owned a direct plumbed machine I have no idea what is included.
I know I'm rambling - but I've been reading so much lately that my head is SPINNING! Any help you guys could offer would be great!
OH - I almost forgot: I sent an e-mail to Chris 9 days ago asking many of these questions. He hasn't responded (which is VERY strange for him). I actually called yesterday afternoon and asked them if Chris was on vacation. They said "nope, it's Friday afternoon and he's golfing."
I certainly understand that (it was beautiful and a holiday weekend to boot). It seems really strange to me that I haven't heard from him, though. I just wanted to mention this before anyone said "please go bug Chris!"