Sir
You cannot get a 12W6 even used in the budget else its best.
Try to find a Type X used in good condition.
Second comes the JBL P1224 and third JL Audio 12W3.
RF P3 D412 and Polk MM 1240 DVC are also equally good if you cannot find any of them.
A lot will be depending on your AMP, enclosure size, construction and its MDF.
Regards