David - Machinist in wood
What's your budget, Chuy? How often do you plan to use the CNC? Are you going to be doing just signs and plaques or will you be wanting to do short production runs on engineering type pieces? The requirements, and cost, for these are different. You can do signs and plaques all day long on a more robust and rigid machine along with the engineered pieces in quantity. A smaller and lighter machine may not be as repeatable or accurate as the heavier and more rigid machines but that doesn't matter as much on signs and plaques.