Hi MAHNKEN, Welcome to the forum and CNC! Congratulations - You are at the crossroads of a major increase in capabilities and flexibility by adding CNC cutting to your operations!
You have a number of options with large format CNC Routers to consider. Our company (CNC Router Parts) specializes in full/ready-to-assemble machine kits that allow people to assemble their own machine, save money (and shipping costs), but with the certainty that the result of your labors will meet specs and that you have a reputable company behind you if any issue/concerns arise.
My initial recommendation, and what many cabinet shops end up going with is to consider the PRO4896 with NEMA34 Plug-and-Play Electronics and our 2.2kW Air-cooled Spindle. This will allow you to process full 4'x8' quickly, accurately, and efficiently. For software, I'd recommend trying Vectric vCarve PRO (free trial link on our product listing) --> VCarve Pro CAM Software | CNCRouterParts
You can see a video that one of our customers posted of the PRO4896 machine cutting cabinets --> .
Here are the relevant product listing links; You can look through the "recommended accessories" to add everything you need to have a "Ready to Assemble" kit that you can assemble and start cutting with immediately. As always we are just a phone call away, feel free to "contact us" via our website and we'll get right back to you (include a phone number if you'd like a call back). --> CNCRouterParts
PRO4896 Mechanical Kit
NEMA34 Plug and Play System (or our NEMA23 Plug-and-Play System to save some money - does the same work just not as quickly)
2.2kW Air Cooled Plug-and-Play Spindle & VFD (we also have router mounts for most common sized "hand-held" routers)
I think you'll find our customers to be incredibly knowledgeable about how their machines and many use workflows relevant to your needs, this is a great forum to benefit from their experience and expertise.
Let us know if you have any other questions, Thanks!
-Nathan