upgrade 5.2.1 -> 5.3 when it's stable?

[Dan Rue]

I've got a new server coming in and I have no interest in putting 4.10
on it.  I'm comfortable with 5.2.1 - but i'm wondering what the upgrade
from 5.2.1 to 5.3 will be like once 5.3 hits stable.  I'm considering
running 5.3 beta for a month, but I would prefer 5.2.1 if the upgrade
will be trivial.

Thanks, 
dan