Hi alex.
Now thats a huuuuuuggggeeeeee question

No worries but more info will give better answers from the far more informed members on the forum than me

Your first salmon setups a big step and a relatively expensive one....... particularly if you make mistakes like i did....... more than once!!!!!!
heres my input
1) casting lesson from a qualified instructor
2) casting lesson from a qualified instructor........ and so on!!!!
pick his / her brains about options for your destinations and try before you buy.
You need a line to cover many eventualities and personally i cant see past shooting heads for this.
for something to wet your appetite, gac are selling guideline power taper distance heads for £25 a pop, which is a steal!!! but youl need to add some poly leaders to this.
And garry evans are doing a free scierra mwf v2 shooting head system (running line, 3 bodies and 3 tips) with some of there salmon rods.
tight lines
Rod