Obviously the BEST fat burner is diet+cardio, but while that maybe true - it's not the easiest thing in the world to get done.
First, you need to discuss your diet, I would suggest looking into anabolic, bodyopus or evolutionary diets.
Second, there are 3 options on the market right now for fat-loss:
1) Cardarine (GW-501516), it's a SARM that aids in increased cardio shape and boosts fat loss.
Here are some logs (including mine) about the product:
http://www.elitefitness.com/forum/anabolic-steroids/gw-501516-cardarine-your-cycle-1275003.html
sarms1 GW-501516 (Cardarine) Log
Here is some reading material about Cardarine:
GW-501516 Facts - Evolutionary.org
http://www.elitefitness.com/forum/a...tly-what-does-why-its-so-amazing-1181353.html
2)
Clenbuterol - time tested fat loss product, but has some side effects to it. I would put it tier 2 to Cardarine because it's a bit hard to use (side effects from clen can be nasty).
3) N2Slin and N2Burn from N2BM are still the 2 hottest items for fat loss on the market. A good combination of the 2 products delivers amazing results.