Welcome, you will hear Prevost, Newell, and Foretravel are the only way to go but you will have to go older than your current rig for $90K and no slides. The main reason for going DP is because the rig is over 38' long, otherwise a V10 will do the job. Assuming you are wanting something 40' or longer and for FT I agree, but you will hear...buy what I have as I must have made a good choice when I bought.
So, the only way to go is a Monaco Dynasty 42' or longer :B Having owned my rig since almost new (13 years) I hope to use it for another 13 years. If I had to replace it would would be with much the same or maybe up to 2006 and maybe one level up...Executive which would be within your budget. It's been a good rig and I'd hate to go through the learning curve on a different brand MH with different system.
I somewhat agree with the above post...keep what you have as even on a 04 DP the systems are a lot more complicated BUT I have 9000 lbs of CCC and even for half time we use a lot of it. Good luck in your search.
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Here is some reading on this subject.