Lost in a sea of amplifiers......Which one to choose?

Well, the time has come for me to get a new bookshelf speaker set, this time not powered one.
Thing is that I have no clue which 2-channel amplifier to get for the job. Too many types out there and not clear enough which one does what.
I already got the source, it's the R9 by FiiO which I am using with FLAC tracks. But what amp would be ideal to plug into the R9? From what I read a regular amp will do but some people say integrated ones are better (the R9 does have a preamp I think?).
As for budget nothing fancy, max $1000.
Thanks in advance for whoever posts :)