IMO, from your description of the intended usage I would go with a small block with the most torque and horsepower in a rpm range that is useful. Buying a engine with it's peak outputs in the off idle to 4500 rpm range would seem like the best pick. One that makes it's power from 2500 rpm and up would be a disappointment for a daily driver.
The 200 is a good choice as long as the final drive ratio is optimized for it. If you have tall gears, (lower numerically) very low 3's or even lower like into the 2 series and add a overdrive to it, it will be a poor performer when in over drive likely constant shifting in and out of OD with slight loads on the engine.
Carb vs. FI, for your use I would go carbed. Not only would you need the computer and proper wiring harness, and sensors the fuel system would need upgraded to a electric pump and a return system. A new quadrajet from a reputable source would be my choice, a nice small primary side to help with drive-ability and mileage and the added flow from the secondaries when needed.