For a Simple setup on a budget you can get the Sony Touchscreen remotes.
The RM-AV2100 is $99 US and controls 12 Components.
I personally would recommend:
Low Budget [$50-$300]: Sony RM-AV Series, Harmony
Mid Budget [$300-$1500]: Pronto Series, iPronto, Universal
High Budget [$1500 - $10K]: Crestron, AMX, Elan, RTi
Hope this helps...