88-94 Rear Ext. Speakers

[1971chevylongbed]

Hello, lately i have been thinking about replacing the rear speakers in my 1994 chevy extended cab truck (Above the back seat). If you are familiar with the rear interior panels on the 88-94 extended cab chevys, you know how much it sucks to take them out. I am wanting some opinions on what to do with them. I have heard of people taking the 4x6s out and putting 6x9s in there, but i dont really want to have to modify it. I could also put aftermarket 4x6s in the stock speakers place. If you have any input or pictures that would be great. Btw, i just installed a brand new head unit, front speakers, amp, and put subs under the back seat.

Thanks, Trenton