If you like listening to machine gunning 'ackackackack' noises,
persistent talking, whistling, screeching and screaming that competes for the loudest volume when you eventually have to turn up the TV/radio, or just want to have a conversation, go ahead.
Our first bird was inherited after the death of a relative, and we bought a second bird as we were advised (by a knowledgeable person) the screeching from ours was because he wanted a 'friend', (the relative used to frequently sit and talk to him for hours on end as she was unwell, so obviously he was used to a lot of attention we couldn't always give him).
The original bird got louder, then the second bird eventually started up. We had to move the cage to a different room when we wanted to watch TV/a film because of the constant noise we had cockatiels years ago, and they were nowhere near as bad as the fecking budgies. That being said the feathers/mess issue never bothered me as it was quick and easy to vacuum or wipe up.
I'm not trying to sway your choice either way, but from experience it's not always a laugh a minute, what may be funny or endearing can rapidly wear thin when the noise levels get too much, and no, covering them with a blanket doesn't always work either.
PPs have said that the birds become like background noise, in our case it wasn't, it was full on all day, with breaks of up to 15 minutes at not very regular intervals before the screeching and 'acking' would start up again.
Despite warnings, MIL took them after we'd had them around 18m as she didn't want us rehoming them to a friend who had a large heated aviary....and they're still as noisy now and driving them all mad.
You may end up with quieter ones, or you may not, it depends. Our household is in no way loud so the reason for the excess noise wasn't to be heard in that respect, they were just noisy sods.
Its worth having a proper think before committing yourselves, just don't rush into it 