hp pc wanna swap for a apple imac pc !

ive got a great pc hp specs model g5200uk processor amd athlon ii x2 220 processor 2,80 ghz ram 4.00gb ddr3 1tb harddrive grafix card nvidia geforce 430 system 64 bit genuine windows 7 comes with all bits keyboard mouse an a very nice sub with speakers pc screen full 1080p samsung 23 inch model b2430 reason to wanna swap always wanted a apple mac nothing is wrong with my pc works perfect warranty ran out but before it did was fitted with new mother from hp only 5 months ago id like a apple mac similar to these specs thanx call or txt model of imac an specs thanx