Re: stucco or siding
EIFS stucco will provide you with pretty much maintenance free , insulated and longevity if done correctly . Besides if you already have stucco there won't be much change to the look of the home --- unless you're looking for a change.
If a change to the look of the exterior is desired then sheathing the exterior with rigid foam covered by hardiplank ( installed correctly with a rainscreen ) will meet the insulation and longevity criteria though there will be some future maintenance with paint.
2 cents worth.
"" an ounce of perception -- a pound of obscure "