I have a diode laser for personal use and love it. I mostly do wood, leather, tile but it also does ACP really well! It's the most cost effective type of laser. However with
signs, you likely want a CO2 laser. "CO2 lasers are generally the best choice for cutting acrylic, offering clean edges, high precision, and the ability to cut both colored and clear sheets efficiently." I spent about 40 hours watching youtube videos on reviews before I decided on a brand & how many watts to get as well. Good luck! Check out my site for samples if you want: chaoticjoycreations on FB