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As the almost always nuetral moderator I've frequently advised, go with what the dealer starts you with until you have a reason to change. I've observed lot of people who found one worked better for them than the other and about an equal number on each side of that fence. That said, some of these really sneaky dastardly dealers will throw a wrench in my plan by offering you a choice ahead of time. Damm those dealers and their bag of tricks!
Granular bromine...not tablet. Big difference between the two. Di-Chlor works well too. You can regenerate bromine by shocking.
Wow...thanks so much to everyone for all the information. I'll be keeping all the posts for future references. It all seems pretty straight forth but since this is my first spa I'm feeling a little intimidated. At the same time my spa is being delivered my in-ground pool is being converted over to salt water. Talk about learning two different processes at the same time