I agree with Bones2003, it's easy to get caught up in the suspension mod discussions and convince yourself that you need something when you don't.
As to solar, etc., these have everything to do with how you'll be using your new MH, camping without shore power, etc. A key factor will be what kind of appliances you have. If you're "all electric" with a residential refrigerator and electric stove, your off-grid power needs will be greater. Experience with your new MH will help you determine your needs.
2002 Itasca Suncruiser 35U