If money isnt too big of an issue Volcano vaporizerss and their generic knockoffs are pretty awesome vaporizers. You can also look at eating it if the smoke starts to affect your breather. Not as easy to dose as smoked at first but fine tune it right and you can stay stoned and satisfied without affecting the lungs. In my personal experience sativas tend to be the smoother, not-quite-as-robust smoke that is easier on the lungs than other types. Specifically, some indica or indica dominant hybrids (like that sexy bitch Romulan and more recently Girl Scout Cookies OG) have expansive smoke that breaches your lung capacity well before smoother smoke would, causing you to easily misjudge the size of your hit and possibly induce harsh coughing. They both stand out as strains that induced much coughing while I had them in stock.
Really smooth ones with name recognition I remember as of late that would be less apt to induce coughing would be Blue Dream, White Widow, and Jack Herer, etc. Pretty sure there are established seeds available from several companies that ship to the US discreetly for all these strains.