I'm going to 2nd Prospector. I've played this game many times and have a couple Sonics in my line-up. They are fast and fun. They use standard Williams parts and usually have perfect playfields..they used some special clear on these that never seems to wear.
Hot Tip would be my 2nd choice..nice variety of things to shoot for..drops, spinner and a captive ball. Cool backglass...must like orange.. Check out this video for a good idea of play: