Yes Bettas are gorgeous fish and everyone knows that I love them, but sadly they do not do well with other long finned fishl They think they are another
betta and the fight is on. If you don't want your other long finned fish attacked by the little devils, it would be my advice to pass on the Bettas. ( As sad as I am to tell you this, because I know you would make a great Betta keeper!)
Perhaps you will have another opportunity some time in the future, as they are lovely fish and would get along with most of the short finned varieties provided THEY aren't fin nippers. Hope this was helpful.
Rose