http://arstechnica.com/gadgets/2011/...-cost-so-much/
http://www.ebay.com/gds/Deciding-Bet...7629520/g.html
They trade blows performance wise. If you play more Nvidia favored games go with a 770 and same can be said for AMD. Nvidia has some decent recording options and possibly okayish for streaming, have heard mixed things about the streaming. 280X come with 3GB vRAM which could come in handy with textures pack for games like Skyrim. You'd have to bump it to a 780 to get 3GB vRAM with Nvidia. 4GB 770 model really isn't worth the extra cost as the memory bus isn't big/wide enough to take advantage of the extra vRAM. personally I would go 280X or 780, if vRAM is a non-issue then the 770 is perfectly fine.
http://www.tftcentral.co.uk/reviews/...412m.htm#u2410
in above link you can see a comparison between two similar displays one being 8-bit (IPS) and one being 6-bit + A-FRC (e-IPS simulated 8-bit)
It's not awful by any means but it's not great either but it also comes at a price premium of course. With the US price the choice was easy but since it's quite a bit more, I can't tell you for sure but you can read the pro/cons and decide.
As for other comparisons, the Asus is adjustable (height, tilt, swivel), DP port which might not be a big deal but it's there if you want/need. Great assortment of cables, the LG only comes with VGA which you definitely want to change to DVI or HDMI.