I think your existing components will be fine BUT
1. make sure the model you select will work with a MSW inverter if that is what you have, The RF107 Samsung will do that. The unit we selected did not but we had a sine wave inverter so it didn't matter.
2 I think any residential fridge install should include 400 watts or more of solar on the roof. Its not expensive and pretty much returns any dry camping capacity you may have lost in converting to a residential.
3. If taking this approach I can't think of any downside to converting to a residential. There are however many upsides. Once in awhile you will see a post about someone mentioning that converting to residential will lower the resale value of the coach. I disagree and believe the contrary. If I was looking at a new or used coach I would look at a coach without a residential as a future expense as it would have to be changed out immediately after purchase. I doubt you will be able to buy a middle to upper end coach in the next few years that has an RV fridge. There are no downsides to a residential if the coach is properly equipped. For the record we are avid dry campers and full timers. I have converted mine and been involved in two others.
Good luck and happy camping.