This is a tough one, man. You're going to have to make a compromise. That lumpy or lopey sound comes from a long duration, big overlap, and quick closing lobe ramps. Usually that means that an engine is built to start putting on heavy duty power well into the RPM band, say upwards of 3000 rpm....and typically equipped with a big stall and tall gears.
The intended use of your car is to daily drive. You don't want a big lopey cam for this. Well, let me ask instead of assume....
Which do you want...
A 307 that is a dog...absolute DOG that "sounds" like it is mean but can't get out of its own way
-or-
A 307 that when you mash the pedal, the car actually responds
???
That sound you're looking for, usually means that the engine is over-cammed.
That Howards cam I linked from summit is still a good choice. There are others though. I suggest a cam on a 110 LSA or 112 LSA, and advertised duration around 250 to 260.
Here are a few to look at....
http://www.summitracing.com/parts/SUM-1101/
http://www.summitracing.com/parts/SUM-1100/
http://www.summitracing.com/parts/SUM-1787/
http://www.summitracing.com/parts/ISK-201256-262/
http://www.summitracing.com/parts/ISK-201256/
http://www.summitracing.com/parts/LUN-60100/