I wouldn't recommend starting with Hunters block as the price of these cards is very high and they are hard to obtain. Alot of cards have errata, and there is little in the way of rules support for when you get stuck. It is true that there are alot of powerful cards in this block however.
I'd go with FOTR block - at the moment the out of print RotEL set 3 can be purchased as a whole set on Ebay for a reasonable price. So access is pretty easy, and it is a cheaper option. This format has been played extensively, it has been shown to be balanced, and there are little problems with rules. It's also a fun format!