this is awesome... exactly the kind of comparison that I know a LOT of people have been looking for.  I know Andrey had posed this idea quite a few times as an inexpensive way to acquire a car as good or better than the M3.  Personally, the look of the M3 is one of the main features that is unmatched by the Dinan model, but aftermarket support is already there to accomplish that. 

So now BMW has aftermarket modification ability that does not void warranty (Dinan) and Lexus recently started offereing "F-sport" products that can be added to or replace stock items on the IS, Nissan/Infiniti is definitely behind the curve in this area.  I mean you can even have the dealer mod your Scion... I'd love to have that opportunity.

THAT would solve a lot of problems... as well as put a lot of people out of business,

just saying... if you're jacksJDMshop.com and your sole purpose is to import JDM honda, toyota, and nissan parts... that would be bad for business if they dealership started doing your job for you.  Especially since the importers typically markup these items a LOT, and if you get it from dealer you're probably paying a slight markup in price but not the outrageous shipping fee

true...

/thread jack complete

time to talk about how BMW overcharges for the 335i and even moreso for the M3 again

The Dinan stage kits aren't too pricey really.  I mean you can get 1-3 at under 10k and thats upgrading a LOT of stuff

Here's what I'm referring to... this is like level 3 working your way up their mod chart:

S2 Package (For cars equipped with the factory oil cooler)
Product Number: SE92-335S2FO

Dinan S2-335i

The Dinan S2-335 builds upon the S1 package by increasing output to 398 hp @ 5700 rpm along with 429 lb-ft torque @ 4300 rpm*
Price: $10382.46

Stage 3 Performance Engine Software with High-Boost Upgrade; Performance Intercooler; High Capacity Oil Cooler (for cars equipped with the factory oil cooler); Free Flow Exhaust; Stage 3 Suspension System (Performance Springs, Koni Struts and Shocks, 28mm Front Antiroll Bar, 15mm Rear Antiroll Bar; front camber plates); Dinan Pedal Pads; Dinan Deck Lid Badge; Serial Numbered Dinan-S2 Plaque

IMO, thats really not a bad deal, considering the return you will see after installation.  Now the INSTALLATION charges... probably suck.  I'm guessing that is what you were referring to with your $2k price?  I bet that would be astronomical on a kit like the one I posted above!