Yes, usually the top tier gas stations have high quality gas, but you still need to find one that doesn't let their gas sit too long, like one way off the beaten path.
The cheapest top tier 87 from a high volume station. You don't need anything higher than 87 if your car calls for it, but you want to make sure you don't run cheap 87 either.
Some people believe the higher octanes do have more detergents, like with Shell, so if you want to run a cleaning cycle and load it up with some Gumout all in one and Shell 93 once and awhile go for it, but 87 the rest of the time.