I am not very comfortable with online shopping these days, unless they accept COD. I shall call Amarbir and find out if they do.
As for the PSU, you are abosolutely right! I had the same suspicion earlier and it is now clear to me. For some unknown reason, some online vendors sell PSUs from Corsair with model numbers starting with "CMPSU"! So, "CMPSU 850HX" and "CMPSU 1000HX" are actually from Corsair, as labeled by certain vendors, and also so listed by the "other magazine", but I checked Corsair's own web site and these are listed as HX850W and HX1000W, respectively. Thanks for correcting me.
I called Dell India today but they said they are not selling UltraSharp 2408WFP any more.
I am not sure about Palit products, because I read reviews on several of them but none earned too high a compliment. Zotac is the name now, as were EVGA and XFX earlier, that uniformly gets high recommendations. That is why, rightly or wrongly, I am sold on Zotac. However, if I cannot get the GPU I want from Zotac, surely I must look elsewhere. You are much better informed, and if you recommend Palit, may be I would be happy with a Palit graphics card too. Tirupati is a distributor, right? Can you suggest any specific vendor in Kolkata. I got one reference: Shree Sagarmatha Distributors, 14 Chandni St. They seem to be distributors too.