The rule of thumb typically is try to buy the car with the least amount of miles. If it "were me", I would probably go for #2 even though it's 6K more. Probably "less cost" in the long run as it sounds like you like to keep your cars for a while.
2011 328i Sedan/6sp mt/Jet Black/Black/Dark Walnut/ZSP/ZPP/Htd seats/steering wheel/rear shades/HK/Sat radio
1997 328i - gone "my first love"
BMWCCA # 367299
ED - 5.14.10
ED Drop off - 5.22.10
Car arrived in Brunswick, GA - 6.21.10
Released from Customs - 6.25.10
PCD Redelivery - 7.12.10
Picking up the car at the Welt: http://www.youtube.com/watch?v=R6Ulzi58u6I
My 140MPH A92 run: http://www.youtube.com/watch?v=DRej5VEQpmc
ED May 14, 2010