My $.02.....the volvo DPX is a better product, but sale/resale is a problem. A dealer told me if a potentail client sees black on teh back then he doesn't have to "sell" the engine package. (how many people sign up for AOL when they buy a computer even though they SUK)
Also had a 2001 Formula 312 just like mine for sale at a local repo lot for almost a year because it had Volvo 385's and DPX drives. Ended up selling for around 73K.