Tough decision....
Music is good in SE W series like W800i, W810i... Buy them if u've money & r really interested in music...
K750i's cam rocks. Music's good... but W series r better. Buty W series if u really want really good ipod quality music alongwith rock-solid picture quality.
If u get any W800+ with the money u've right now... go for the phone.
But if u've lesser money... for ur interest in games & age... I suppose an upgrade on the graphics card'll do u good.
Then u can save the money got on the old graphics card & the existing phone & try buy the SE W550i, Starting-level SE Walkman phone in the series or collect some more money & go for the higher-end Walkman phone series. This way u get both the graphics card & phone *img116.exs.cx/img116/6469/g5cgrin.gif
New GraphicsCard-old GraphicsCard-old Phone+MoneyFromBoth+LittleMoreMoney
= New(GraphicsCard+SE Wlkmn Phone)