Need some advice in regards to some wines I picked up

[iWine]

I was out shopping and found the following on sale:

2003 Barton & Guestier Chateauneuf-du-Pape Syrah from southern Rhone France

2005 Chateau Ste. Michelle Chardonnary from washington state (had their rieslings, rather enjoyed them)

what I am wondering is should I age these wines or would it be best not to, if its best to how long would be best and what climate and conditions would be required?