When deciding on purchasing a cnc router, take into account both the capacity (bit shank) and size (Horsepower) when making your decision. A router with 1 HP or less should be just fine for crafts, hobbies, models, etc. while a router with 1 3/4 HP or more and 1/2 inch bit shank capacity will be needed on professional projects involving work with hardwoods or shaping/forming pieces in a router table. The added power will allow for deeper cuts and completing cuts in 1 try. A lightweight router with plastic housing should be fine for light use but consider metal housing for more professional woodworking. Modern routers have electronic features like the electronic variable speed control which should assist you in making more precise cuts. The EVS has a “soft start” feature which users say is ideal since it speeds up the motor gradually. Many plunge routers already have this feature and more and more fixed-base routers are getting it as well. If you do inlay work or dovetails and need precision cutting depths, then make sure the model you choose comes with a fine adjustment control. A “self releasing” collet (holds the bit) should prevent stuck bits and are usually found in higher quality routers.
You can purchase many routers at Redsail and you can read customer reviews and get feedback on the advantages and disadvantages of each model. Of course going into Lowes or Home Depot to actually touch the levers and see them in action is priceless research as well.