As far as which ticket to get, it really depends on how often you think you'll be coming to Disney and how much you have to spend. Because of the way Disney tickets are priced, a 1 day ticket is a pretty bad deal... especially if you do plan to come back fairly frequently.
A one day ticket will cost you $84.14 (including tax).
Right now they have a special for FL residents that allow you to get a four day ticket for $105.43. This is a great deal, but it has some block out dates around easter and is only available until (and must be used by) May 25th.
Alternately, if you don't think you'll be at Disney 4 times before the end of May, but think you might come occasionally you can get a regular FL resident 4 day ticket for $174.66. This is a special ticket that has a 6 month expiration window, so you'll get 4 park days that can be used anytime within 6 months of the first time you go.
Finally, if you think you may be coming more frequently then you might want to look at the seasonal or annual pass. The seasonal pass is $265.19 for an adult and gets you in all year, but does have block out dates. You can't come during the busiest times... typically it's two weeks around christmas and new years, two weeks around easter, and most of the summer from mid june to mid august. Frankly, since these are some of the busiest times you might not want to come to the parks during those times anyway.
Lastly, you could get an annual pass for $392.99. This is good for a year and has no blackout dates. The other big advantage of the annual pass is that you get free parking. Since parking is $14 per day, if you plan on coming a lot then the annual pass will pay for itself.
HTH,
Brett