What ever you do? DO NOT BUY A SHOOTING HEAD LINE. I had one and i have used it and its no good. You might get good distance casting but it takes more effort. The best thing to do is get a WF line. When i used my shooting head i ended up pulling a muscle in my shoulder and where the line joins, The shooting bit and the thin bit. It becomes loose and can snap when casting. WF lines are the best buys. Orvis and Cortland lines are very good. I have been going fishing with a casting instructer nearly every weekend and i have very good casting now. I can easily cast the line into the backing without any struggle or movement from my arm, It all comes from my wrist. I have watched loads of people use shooting head lines and they always say they are brilliant but if you watch closely at their casting you will notice that they are using to much force, power and effort. Lines should be casted in a comfortable way, Well my brother used a shooting head line for a day and he was exhausted after it, The shooting part in the line is like a brick and when you backcast its falls very quickly so you would have to overhead cast. Im just telling you what is best because if you buy a shooting head line, You will like it but here is the differences.
When you cast the shooting head line you will be using to much effort and you can easily snag your fly off bushes or tress nearby because the lines drops very quickly.
WF line, When you cast this line you will get the same distance as the
shooting head line but you will find this easier to cast and 100% less effort into your casting, Another thing is you can easily control the loops in your line with WF line but when you use SHOOTING HEAD LINE the loops will be terrible and it will be very hard to make a loop with the weight of the line. Second of all you can easily hurt yourself with it, Just like i did. I threw mine in the bin, Common sense mate they are *****.
Try it out for yourself and you will see the difference.