Help Needed on when to drink wines

[Mulch]

Hola
I am located in Perth, Western Australia and have been lucky enough to have some great friends in Spain. They have given me some wines which I would like to keep as long as possible, but not past their best drinking age. I was hoping someone out there with more knowledge on Spanish Wines might be able to tell when I should drink the following wines...

Coto De Imaz Rioja 1995 Denominacion de Origen Calificada Reserva 25 Aniversario

La Rioja Alta SA Vina Alberdi Rioja Reserva 1998

Marques de Caceres Vendimia Seleccionada 1999 Rioja

Beunos Dias Amigos
Cheers
John
(The Mulch) Perth Western Australia