If the fractal is just for desktop wallpaper I render at 1024x768. If I'm making a print I render them at 3200x2384. I only print out at 8.5x11 as I use my printer here. I don't have a hugh pc and a print size/quality render can take anywhere from 16-24 or more hours. Wallpapers take about 10-15 minutes. I doubt I'd have a pc left if I attempted the size you make yours! WOW...LOL ;o)

Treat people as if they were what they ought to be...
And you help them to become what they are capable of being.
                                                                ~Goethe~
R.I.G.H.T.S.