Full individual leather costs $6825
Extended (better than partial but not full) individual costs $5000
Full merino costs $3500
Extended (partial with lots of plastic) merino is free
I would recommend full merino or full individual. Others are not good IMO.
2014 ///M5 Individual Frozen Grey, Silverstone Full Merino, Piano Black, Exec Pkg, Drivers assistance plus, LED Pkg, Bang and Olufsen, 20" 343M Forged Alloy Wheels
Countermeasures: Bel StiR+, Laser Interceptor Quad HP, Zaon MRX
Upgrades: Eisenmann Sport with M Performance Carbon tips, Dinan anti-roll bars