Whatever route you take make sure to buy quality equipment, I like to say "do it right or don't do it at all. Quality does not mean the latest and greatest or most expensive, that is where research comes in. A tank in the 60G to 90G is a lot more forgiving to a newbie learning about water chemistry and how the elements interact and affect each other. A ph monitor really will show you what a test kit can't on how adding certain thing's influence. A ro/di unit ensures you are putting in good water, an auto top-off helps with the all important stability aspect as does a refractometer. Read, read and read some more before jumping in.
Cheers,