by MSRP coverage i'm going to assume you are referring to replacement cost coverage. a MH depreciates over time. if you have replacement coverage and your MH is stolen or destroyed in an accident you'll be able to replace it because you'll get what the MH was valued at at the time of purchase. if you have std. coverage your settlement will be for the current value of the MH only.
let's say that you paid full retail of $100K for your MH. the minute you sign the papers and drive it off the lot your $100K MH is now worth anywhere from 20%-30% less. get slammed by a semi as you exit the lot and you'd be $20-$30K short of replacing it. extreme example sure...but I think you get the point.
only you can decide how much of a gambler you are. and, AFAIK, replacement coverage policies are only in force for 3-5 years. after that the coverage becomes standard. be sure to thoroughly understand whatever policy you purchase.
Rich
Ham Radio, Sport Pilot, Retired 9-1-1 Call Center Administrator
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2016 Itasca Suncruiser 38Q
'46 Willys CJ2A
'23 Jeep Wrangler JL
'10 Jeep Liberty KK
& MaggieThe Wonder Beagle