Never stayed there, but La Playa in Naples is a FHR property and seems to get good reviews.
There is also the Waldorf Astoria in Naples but I dont think that is a very good property.
The waldorf is actually quite nice ,it's not on the same level as the two Rc's but acceptable and quite cheap,it's own beach bar too once you walk the half mile down to it.
There's an upscale shopping centre nearby with some nice restaurants.
I thought La Playa was lovely. You could stay there and walk along the beach to the R-c.
Rates at the R-C are ridiculous imho.