New to Desktop

Hello guys!  

Newbie here. I've been using my laptop for quite a while for gaming and photo editing; thinking to build a desktop. I need help to build my very first desktop. ( I built one before during the old pentium 4 days, 2002)

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APPROXIMATE PURCHASE DATE: A.S.A.P

BUDGET RANGE: Not more than $1300 + monitor

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: GAMING, photoediting, animation

PARTS NOT REQUIRED: Mouse, keyboard, sound system, OS

PREFERRED WEBSITE(S) FOR PARTS: newegg.com

COUNTRY OF ORIGIN: US

PARTS PREFERENCES: not sure to go for AMD or Intel chipset ( I heard intel will release a new chipset in 3-4 months (some rumors)).

OVERCLOCKING: Maybe

MONITOR RESOLUTION: 1920x1080 maybe? (currently I have the old samsung 226bw (1680-1050) attached to my laptop)

ADDITIONAL COMMENTS: could last for at least 2 years to come (for gaming) and work best for photo editing (current: Adobe CS3, planning: Adobe CS5) Lightroom, Sony Vegas. After couple of reviews, my photoediting and animations suit better with Intel. I want to play my Bad Company 2 (currently at lowest settings with my laptop) with the best settings, other games: SC:conviction , Assassin's Creed 2, Just Cause 2, GTA, and C&C

OTHER QUESTIONS: Is there any differences between GPU and chipset (AMD/Intel) compatibility/performance like bandwidth etc.

Thanks!  
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Case: LIAN LI Lancool PC-K62 Black 0.8 mm SECC, Plastic + Mesh ATX Mid Tower Computer Case
http://www.newegg.com/Product/Product.aspx?item=N82E168...

GPU: Ati 5850 or 5870

PSU: Antec EarthWatts EA750 750W
http://www.newegg.com/Product/Product.aspx?item=N82E168...