06' silverado crew cab subs under back seat

the crew cab seats have very very little room under the backseat and i was curious as to who out there has come across this problem and what did yall do? i no you need to order that special box thats custom made for that seat. i know it will fit two tens and what brand did of subs did yall use? how much did the subs and box cost? im working on a udget and just trying to get a rough estimate of what i will need