Old Howards are good, with 10 pole plots you could even look at a Gem... in order of usefulness of accessories:
POtato ridger out front by a distance, then pick tines, roller and the spade wheels, then a double-wheel kit, then the trailer. Try to get one with a modern engine, those old JAP and Sachs units look great, adn if they work well they're fantastic, but they're not getting any younger and neither are the old geezers who can keep them running....