AMD Phenom™ II X4 955 Black Edition / AM3 / 3.2Ghz / 125W
Gigabyte 870A-USB3
TEAM XTREEM DARK 1600Mhz DDR3 Gaming RAM 4GB Kit (2x2GB)
SAPPHIRE HD5850 Xtreme 1GB GDDR5
Samsung 1TB F3 SpinPoint 3.5 SATA 7200RPM 32MB (HD103SJ)
LG 24X DVDRW SATA
Corsair Builder Series™ CX500 — Single Rail True Power Supply

i want to change from amd to intel i3 or else. what should i change other than mobo? PSU still can support if change to intel?
suggest me a good processor n mobo. also quote me price