Hi,
the 05'range of fluvals are pretty quiet. I have 2 405's running in my bedroom and they are quiet as.
I also have an eheim pro II 2028 running on the same tank and that is just as quiet. perhaps marginally quieter at most.
With the 3 filters less than 5feet away from the bed I am yet to complain about the 'noise' cause there is none.
I can also comment on the following -I have trialled and tested every one of these.
Externals -
Eheim 2213, 2215, 2217 - slightly more noisy, but still quieter than some others on the market. Often sound problems are associated with incorrectly placed ceramic shafts and un-lubricated O rings.
The Eheim pro III range is near silent but comes with a very heavy price tag.
Fluval - 105, 205, 305, 405 - very quiet. I think there is no sound difference between a 205 and a 405.
FX5 - quiet, relative to the size of the filter and its capacity. would do better in a cabinet if it was in your bedroom.
If I was in your situation and had no intention of upgrading the tank in the foreseeable future, I'd go either for the Eheim 2213 or the Fluval 205. I'd be partial to the fluval in this case because of its ease of cleaning and priming compared to the eheim classics. If you have troubles starting and/or priming the Fluval 05' series - you're doing it wrong.
Internals -
Eheim internal range - 2008 - 2012 - dead silent, you need to press your ear against the glass to hear it.
Eheim Ecco range - slightly more noisy than your fluval + range and the classic eheim internal range. still very quiet.
Fluval+ range (1 to 4+) - quiet, marginally more noise compared to the eheim. nothing to complain about.
Fluval U series (all sizes U1 - U4) - As quiet as it gets. Price is astronomical and is often cheaper to get an external in place of the U3 / U4.
HOB Filters -
Aquaclear range - Mixed reviews. Often rattle because of the plastic lid, but when removed is dead quiet. I have a number of them that are dead quiet, and 1 that rattles slightly no matter what I do to it. flow can be adjusted and often this reduces the sound.
HTH