AIO or sump

[pirate]

Well I was given a stardard 50 g tank by a co-worker and it came with a stand and cheep hood/light, and I was thinking about drilling it and going with a sump, but then I keep reading about the noise from the drain.

Then I thought My BC29 is quite. Could I do a AIO inside of this tank?

If I do an AIO how big should the internal sump be? The full width of the tank or only half, maybe just the middle of the tank?

Or am I just dreaming and just get the thing drilled already. I have lots of questions but I need to figgure out what I'm gonna do with this tank first. AIO or sump it