It all depends on the engine. Examples:

Chrystler: Champion or Denso
(Most) GM engines: AC Delco or Autolite
Ford: Motorcraft or Autolite

etc.

And with GM, which I have the most experience with, Bosch plugs are considered junk.

 

Alright, the new plugs are in... NGK BKR6E. Install was easy, everything is good. I took it out for a quick trip after the install and the lower end seems a little smoother and I swear the turbo is slightly louder...... most likely from the new air filter and the 710N dv, but I am just noticing it today.

Next on the list is a boost gauge, time to start shopping!

 

Go VDO! I've got one and I love it. Totally matches the stock gauges. Stealth! =D

 

Yeah, I saw your setup in the Boost Gauge thread that is active right now... it's a clean look, I like your install location! I was considering the Podi Mechanical gauge package as seen here: http://www.podi.ca/Packages.aspx?CarID=6

I don't mind the "cancerous growth look" as mentioned in the other thread

What is your opinion on electronic vs. mechanical? Is it really worth the extra $$? Is install easier/tougher one way or the other? I have read that the electronic is more accurate, but I don't think that I need it to be spot on...
Are you running mechanical or electronic?