BEST HAIR EXTENSiON BRAND& TECH FOR MY HAiR!

I am a hair stylist and i just got my hair cut at a hair show and i hate it. I have been researching hair extensions.. the best brands and techniques for my hair.. I want something that lasts as long as possible with as little damage as possible! I see the most common is probably the Keratin tipped fusion.. which brand of hair is the best and longest lasting? IS my hair too short? i have sort of like a bob.. my neck line is only about an inch.. and the top is about 3.5 inches.. the sides are about 5.. is this going to be long enough?? please help me! i would like to order them as soon as possible.