Board dillema

[gridironpainter]

I am ready to step up my game and my commitment to this hobby. I have a Super Bowl board from the mid nineties, and realize that there are much better boards. I have been watching ebay for many months and can't tell the small 620's from the regular and I don't want to get a board that is small or too flawed to fix. I have read many bad review of the "new" 620s, with only a few favorable, so that seems like a bigger risk than a used one. I would love to build my own board as I am quite capable of the painting and design, but I can't find any motors and hate to tear up a usable board just for a motor. Please help me come to some solid insight into all of these choices. Thank you for any responces.