I prefer to go by AT, so HD4890 is the card to get for 1680 & 1920. Anyways my next would be ATI dx11, and there's quite some time before that happens.
the only bad thing i found abt the newly released HD4890 and GTX275, 275 AMP etc...are very high powerconsumption and temperature levels , when will they fix it..other than that..both are great buys
the question now is would anyone buy a gtx285..when gtx275amp( which is faster than the stock gtx285 as per recent review) is selling for arnd 260 $!!! and the 4890 for 240$