Hello,
I'm new as well, might as well use the first post for something
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
Currently on a HD7950 which gives decent hashrate.
Your planned upgrade will likely give you more than double the improvement though, wiki lists 280x at around 600-700+ kH/s, my 7950 gets 600+
Havnt tried BTC yet, but looking for the hardware, which seems pretty pricey, GPUs just don't cut it
![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)