Hi all, I was actually shopping for rides for about 6 months and reading a lot of forums on the cars I researched...the Infiniti FX45 was actually not on my list since it's really high priced (about $85K fully loaded--and the fully loaded in Korea comes up short to USA's FX) and not too many around in the used department...The dealer I worked with called me up to tell me I had to come and see a car he just brought in..the FX45...after doing a 3 minute google in his office and a test drive...game over....I'm a new FX45'er...I feel great, but unfortunately I felt bad for the car since driving in Seoul is like raising a German Shephard in a 2 bedroom apartment...Hopefully I'll find some strips of road to let the big dog out....Hope to pick your brains for tips/advice..thanks!!...1st question...stock air filters vs K&N or any other suggestions..will need to change air filter and cabin filter soon,. Heard charcoal filters for cabin were good?...thanks again..PS> Regular gas in Korea is currently $6.18/Gallon, 91-94 rating, $6.60 for premium (100 rating)..will I be good with the 91-94 or is 100 overkill?...I'll let you guys know what kind of mileage I get..