Do your homework and look in every nook and cranny. It won't be anywhere as well built as your Monaco. I know they are two different price points, but the Thor Ace is an entry level coach and you may not be happy once you start comparing things to how your Monaco was built. Also, look at the slide size and what powers it. Thor used the Schwintek slide system, which is a good system, but has it limits. Many of the Palazzo models are having nothing but issues. They only used one Schwintek slide system on their large slides, when two were needed. Our friends are currently having a second Schwintek slide system added to theirs so it will quit breaking down. Eventually, Thor started adding a second unit after all the failures.
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab