Havoc/Epistane are good products that will give you good results. You really need to wait untill you are 21 or after and make sure you do EVERYTHING to a T when you run a cycle. I would read this here
RPN Havoc / IBE Epistane for the newbies ! - Bodybuilding.com Forums
and also check out the logs over at anabolicminds.com . There have been alot of good results.
If you want to try out something else, Try a cycle of Mass FX/Hyperdrol along with Kre-alkalyn. Do about 3,500 of clean cals. a day and make sure you drinking plenty of water. Look into Alpha Drive XL also, It's a great product and can even be used as a PCT.
Peace