Tropical marine snails are generally the most abundant in the marine pet trade because coldwater tanks require extra equipment in most cases. However, even tropical marine snails tend to have an upper limit temperature-wise. Some Turbo species don't like it much over 22C, while others do ok up to 26C. 28C is probably too high for most snails, so if you shoot for 24C as a stable temperature you'll probably have success with most tropical marine snails.
Some good, hardy tropical snails are: Turbo fluctuosa, Ceriths, marine Nerites, Trochus, and Nassarius if you have a sand bed. All of those need a long acclimation by drip-line, and Turbos need extra food if there isn't a lot of algae (plus they're just fun to hand-feed

). Ceriths may dig into the substrate and only be seen once in a blue moon, but they are good janitors.
Two other things to add to the list of non-recommended starter gastropods:
- tulip snails/horse conches. They're completely predatory, preferring other snails as their diet, and not all sellers make that clear. I'm not sure which species are covered by those common names unfortunately.
- bumblebee snails. These also eat other snails.
- coweries. I wouldn't call them harmful, but their diets seem
very poorly documented and even completely incorrectly documented. An example: Dr. Fosters & Smith lists tiger cowries (Cypraea tigris) as carnivores, while all my books list the species as a pure herbivore. From what I have seen, they are opportunistic eaters of anything.