Bump again, little update about how this goes.
So I've been running it for quite a while, just recently a new model RPI2 came out, which is theoretically 6x faster - I decided to buy it in the summer
Meanwhile, during a maintenance check I saw that some dust accumulated on the rpi, since it now has a fan. After opening it up for cleaning I saw that there was a great deal of dust on it, also some hair lol - it's located in a dusty attic corner, go figure. So after cleaning it up I remembered about a post I read a while back, that you can make fan dust filters out of pantyhose. I didn't know which ones, so I used whatever I was given
I cut it up and put it on the fan. After few days you can already see the result - it has blocked a visible layer of dust while letting air through. However I probably used the pantyhose with too small holes, since the fan now draws a bit less air and as as result, the rpi heats up to around 30-32C on normal operation, compared to the below 30C without a dust filter, but whatever, I can sacrifice those few degrees (without a fan it would be above 50C, so...) to keep the RPI dust-free.
With a filter on - all you have to do is brush the dust off and that's it!
Here are pics of how it looks - yeah not so pretty, but whatever, it works!
Also I installed MiniDLNA on the rpi as well, so that TV and Blueray player can stream media properly - shame that some things don't support Samba instead, but many say that DLNA is faster than Samba. Didn't use it extensively as I just installed it, but seems to work really well and is light on the resources, so why not eh
Will check out seafile, never heard of it.
Did you already?