Yeah definitely get SVR 06, well worth the pennies you can probably pick it up for on ebay and shit lol.
For me the SVR series started going downhill once 07 came out. I didn't like the new control system for one (the old way was AWESOME so why change it? At least they've mostly gone back to it now), and the game didn't feel much fun any more. 08 I felt was terrible (and the Wii version... oh god), 09 was more of the same (Wii version was actually quite good), then '10, '11 and '12 felt the same. '13 is still the same in a lot of ways but feels more polished overall. Sucks that they had to go through like 3 games first to get to where it is now. And its still not as good as older games
. I still want DOR 3 dammit