Kinda depends on which Monaco you're talking about. I have an '06 Diplomat the required a French door model because of the limited space in front of the fridge, eliminating a full door model. I used a Samsung 197, but I believe they quit making that model. Measure your opening (taking into account the amount it can be increased by lowering the floor over the furnace) and also the amount of space in front of the fridge for the doors to open. Most fridge listings have the dimensions including depth with the doors open so you can tell if it will fit. Keep in mind that some fridges will not run on a modified sine wave inverter so check to see which inverter you have. If you have a true sine wave inverter, you have no worries. Hope this helps.
I own an '06 Diplomat 40PDQ and love it. The DW and I have looked at other coaches at shows and have yet to find one with a more desireable floor plan (for us). I have had no issues with the coach or the mechanical systems. I do wash the radiator with Simple Green once a year and have had no cooling issues. Because of the increased ceiling height that Diplomat Don referred to, I was able to install a residential refrigerator (one of my better improvements). The 2000w inverter and the IRD board (that charges the house batteries as you drive) handle the fridge load without a problem. The engine is strong (no problem towing). The slide mechanisms allow for replacement of the carpet with other flooring without having to worry about the slide scratching the new surface (another improvement I've done). It handles well on the road (I did have to replace shocks) and is quiet. My only complaint is the Weldex camera system sucks when it's dark. Happily, I don't park in the dark very often. I admit I am biased, but we really enjoy this coach...have owned it for 3 years.
I would suggest you tow. With the present day tow bars, doing it by yourself is no big deal and the braking system attachment is a one person job anyway. Practice a couple of times before you leave and make a checklist so you don't forget anything. Don't let towing scare you. Once you get a little familiar with it, it's no big deal. I have a 40' DP and have had no problems fueling or negitiating campgrounds. If you can't get a pull-through site, just unhook the toad at the office, park the coach and then go back and get the car. If you request a pull-through when you contact the CG, most will do their best to accomodate you. Have a great trip.