You missed an option...
4) Tried it, there were negative consequence, would not recommended you do so.
I did Viagra when I was younger...I'd guess I was in my early - mid thirties as it was between marriage one and marriage two, and I hadn't even made it to New York yet. This chick who was an occasional fuck buddy had access to samples because she was a nurse. she brought some over and I took it. There MAY have been SOME benefit from an erection stand point...but how can you tell, given that at that point in my life I had the sort of erections that would almost always draw comment...as in hard as a rock (I'm also decently hung...not like a porn star, but more often than not I get comments on that too). Additionally, I had always been "long winded" in the sack...enough so that I actually considered it a PROBLEM, not a plus, and had women on more than one occasion "tap out"...
Anyway...I take it...we fuck...and like I said, I don't know if it was "better" or not. If you ask any doctor, THEY will tell you that if you don't actually need it, there is no benefit (which is what my best friend the doctor told me in advance, though he told me to go ahead if I wanted, if I wanted to experiment...no truly negative consequences). If you understand how Viagra works, and how you generate an erection, you would see how if you didn't need it the Viagra would make no difference.
What I CAN tell you it did however, was give me the worse headache I have ever experienced, and also make me jittery as fuck...racing heart, etc. I can also tell you I never took it again after that one time...not even again that weekend, even though she had brought a "weekend supply".
My advice - don't' do it.
I have no experience with the other ED meds...