confused with widescreen resolution

[snarloas1982]

im looking to upgrade to a widescreen monitor but know little about them, im currently playing games at 1600x1200 on a 19inch 4:3 monitor. what size of monitor do i need to be playing similar resoutions at? any suggestions

 

[snarloas1982]

Belinea 2225S1W 22" Widescreen LCD? whats these like? im running a 6700 conroe and 1950xtx i think i might be ok in that department the monitor was my next bit. is there anyway that i could do away with my widscreen tv and use any of the monitors to play my xbox 360 and cable box??