The R9 280X is actually not a new card it's just a AMD 7970 re badged to fit in with the new naming scheme that AMD are using with the whole "R" series of cards.
The R9 280x is a very good card, otherwise I wouldn't have bought one for my dad and most of you know I stick to Nvidia at the moment because for me AMD are not worth considering, but for someone on a budget the R9 280x would be what I would recommend unless you can wait for the "Black Friday" sales coming up and see if you can grab a GTX780.
Avoid the R9 290 or R9 290x as they are just power hungry and hot running monsters that should only be considered if you are going to watercool it.
Rumors are that the GTX960 is coming next month with 2,3 or 4Gb of Vram and will pretty much be the same as the GTX770 currently in terms of performance but with much lower power consumption, which is one of the main benefits of the Maxwell GPU's.
AMD are rumoured to be launching the 300 series of cards around March next year, although no one seems to know what architecture they are using and whether they are going to run hot, noisy and require a nuclear power plant to power them.
Gone are the days of AMD being better than Nvidia on power, heat and noise as AMD are using nearly double the power that Nvidia's cards use since the 700 series launched.
AMD's drivers are still bad though, but there cards as long as you avoid the 290 cards are pretty good and shouldn't be overlooked by anyone needing to replace there card with something that, doesn't cost over £200.
If you can stretch to £250 then the GTX970 is the card to get as it performs nearly as good as the GTX780ti whilst running cooler and using less than half the amount of power.
In case you missed yes the R9 280X is getting a
from me as a card to buy!