Welcome to the madhouse elchupaman,
You will have fun here. You beat me out, on those reserve #4s. LOL They are great smokes, you will like them. Let them adjust, for a couple of weeks, as they seem to be shipped wet, and smoke better, at around 60%-65% humidity. If you maintain a 70/70 humi, as many do, you may want to drybox them, in an old cedar cigarbox, for 24 hours, before smoking them. I keep my Perdomos, and the occasional ISOM, at 60-65%. They just smoke better that way.
As far as domestically available smokes, that tast like an ISOM??? They don't exist. For one that is close, but without that distinct cuban taste or whang as I've heard it called, I would recomend CAO Blacks. Great smooth creamy taste, and a good full body. Don't smoke it on an empty stomach, as they can pack a punch. Much like my favorite ISOM.
Have a great day, and I hope I have been some help.
Later
Dave (A.K.A. Homebrew)