Just decide if you're going to pony up for pharma, or slum it with UGL.
If it's UGL, there's very little now that clearly distinguishes one brand above the others in terms of quality. The old "top color" days that indicated major quality difference are gone. That's a good thing, since all the vendors are more or less offering similar quality rHGH these days. And even if one seems better, you can't be sure you're getting that batch, or whether it's degraded since testing, so it's a crapshoot anyway, but getting ripped off with bunk or very poor quality these days is unlikely.
China's gotten practiced to the point reasonable quality rHGH is the standard now and it's become a commodity like Testosterone.
Sticking with high volume sellers is the easiest route, safety in numbers blah blah. Right now, here on Meso SSA is on top. Probably followed by Lobster.