There are 3 options right now for the 335: Vishnu Procede (newest and most powerful is v2) - $1600, Juicebox (JBS2) - $350 and the Split Second Turbo Tuner - $600.
I think any of these will allow a 335 to beat the e46 M3. But if that M3 were turbo'd or supercharged...
Your right, the PROCede gives you much more then just 30hp
I dynoed stock at 280HP and on the same dyno I dynoed 390 HP (AND That's to the wheels) on both cases. I don't even wanna talk about the torque It's in the 400+ range..
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08 M3
335i Coupe - Sold
91 850i - Dinan Twin Turbo - Sold