samsung, lg, vs, etc offer the same 3-year warranty. it's pretty much the norm. probably the dealers you've talked to just want to get rid of their VS stocks. some shops handle warranty this way. within a year, you can bring it to the shop and they will handle the return. beyond that, you bring it directly to the distributor.
used TFTs? you mean they'll be replacing it with used units. even after you've just bought the defective unit for a week or two? more reason in the first place to get from a manufacturer with a good track record and good customer support. a longer warranty is nice. but if it's use to cover for shabby manufacturing and QC process, then it's not really better, is it?
@madassin
either monitor costs less than i assume what you paid for the vx1932. not only that, if you get the vg1930 and you want to use dvi input, you will have to buy yourself a dvi cable (between 250-600 Rs i guess, depends on the quality) koz it's not included in the package. i'd push for a refund if you can. store credit could be good also (depends on what's available in the store). just not a 1 for 1 replacement, koz you will not get the same monetary equivalent.