I'm a sarms junkie and I add them to my cycles every time. Assuming that we are lumping gw, nutrabol in with sarms here is my list and why....
1)gw caradine- overall my fav because it's so universal and it makes training and cardio a breeze. I stack it with every cycle.
2) lgd- major strength increase, notable size increase
3)nutrabol- size, strength, sleep quality, fatloss, recovery, healing
4) ostarine- excellent for cutting and recomp. I think this is perfect for first times as well.
5) s4- my least favorite...but still serves its purpose in a cutting cycle for sure.
Rad and sr9009... I haven't used but I will be soon.
Lgd, gw and nutrabol is a sick stack....My favorite actually.