I would suggest the Sapphire 7850 as from multiple reviews it seems to be the best balance of cool and quiet using the Dual-X cooler. However out of your choices I would suggest the XFX if you have a case with good ventilation (Goes for the Sapphire aswell). If you have a smaller case I would go with either the HIS as it is $10 less than the visiontek as they exhaust out the back of the case.
This forum is full of Sapphire 7850 problems, I would seriously recommend NOT buying a Sapphire.
I would personally choose the XFX due to the transferable lifetime warranty and previous experience with the brand.
They all exhaust out the back of the case by the way.
There do seem to be a couple problems at the moment but most of them seem to be about driver issues which can easily be fixed. Aside from that being an open air coolers wouldn't the sapphire card and xfx cards exhaust some inside the case? This could matter in a smaller case.
I've been using their products since X1900 and never had an issue, Also, MSI, Asus are great too. My exclusion to the cards linked by the Op is that XFX were good in the past but they lost reliability and covered it with lifetime warranty. Visiontek and Diamond use some low quality low material and are more reference design cards. HIS is great really never experienced a problem with them, but their products doesn't look good to me.
You must be confused. I said Sapphire 7850, i said nothing about your X1900 or any other card that you have owned nor bryon's 5 generations. Please pay attention to the conversation if your going to pipe in.
I'm not going to go back and find every post I've seen about crashing Sapphire 7850's, but there's been at least 5 in the last 10 day's.
Sapphire has a crappy 2yr warranty, which is enough to make me buy a XFX alone, even it costs a little more. I guess there's a reason Newegg is no longer selling Sapphire 7850's, they were probably pulled from the shelf due to returns.
the asus and the msi vrsins are pretty nice. the only thing i dont like about the asus directcu2 7850 is that the cooler exends way beyond the actual pcb as the cooler was ment for bigger cards. the msi ones look good and have good overclocking. i also heard that the xfx is a good choice too