The Beolink 5000 is such a fragile and therefore unreliable device that I would only consider it if it was free.
Get a Beolink 1000 if you want a low cost, reliable remote. Drop it and it will dent your floor but not break. Definitely the easiest to use.
Get a Beo4 if you are more afluent but it wont perform any more functions than the 1000 and will break if you drop it.
They will all work with Beosound 1