Following are my tasting notes for those of the wines on your list that I have tasted.
Chateau Branaire-Ducru, St. Julien, 2004: Showing much as at an earlier tasting. Dark ruby towards garnet, medium- to full-bodied, with super-soft, near sweet tannins and showing a generous array of berry, currant and black cherry fruits. Not overly complex but easy to drink and a comfortable match to small cuts of beef, lamb or pork. Drink now-2016.. Score 89. (Re-tasted 28 Mar 2007)
Chateau Carbonnieux, Pessac-Leognan, 2004: Nothing complex here but a very appealing little wine. Medium-bodied, with soft, gently caressing tannins and hints of spicy oak. On the nose and palate crushed berries supported by notes of Mediterranean herbs and earthy minerals. Drink now-2015. Score 88. (Tasted 17 Jun 2008)
Chateau la Commanderie de Mazeyres, Pomerol, 2000: Dark ruby towards garnet, medium- to full-bodied with soft tannins and a bare hint of smoky oak. Opens in the glass to reveal wild berries and cassis, those complemented by notes of chocolate and exotic spices, all with just the right level of complexity to grab the attention. Drink now-2015. Score 91. (Re-tasted 15 Nov 2008)
Chateau Smith-Haute-Lafitte, Blanc, Pessac-Leognan, 2003:Light burnished gold in color, full-bodied and concentrated with generous notes of white peaches, apples, citrus peel and raisins parting from mid-palate to make way for notes of spices and stony minerals. Drink now-2013. Score 93. (Re-tasted but not blind 22 Nov 2009)
Chateau Grand-Puy-Ducasse, Pauillac, 2004: Very nice indeed. Dark garnet, full-bodied, with silky smooth tannins and notes of spicy wood to highlight aromas and flavors of blackcurrants, blackberries and eucalyptus, all leading to a long and generous finish. Drink now-2017. Score 91. (Tasted 17 Jun 2008)
Chateau Langoa Barton, St.-Julien, 2006: Living nicely up to its barrel tasting promise. Soft and round, medium- to full-bodied and with tannins that caress gently. On first attack crushed berries and citrus peel, those yielding to notes of blackcurrants, bittersweet chocolate and a hint of earthy minerals. Not long but generous.
Score 90. (Re-tasted 28 May 2010)
As to the two vintage years, both good but not overly exciting, both yielding well balanced wines meant for moderate-term cellaring.