Hi! I'm thinking of bying refurshed mx-routers, the bandwidth will be around 5-10Gbps and able to cary 3-4 full tables. is the following good RE/linecards? RE-S-2000-4096 DPC-R-4XGE-XFP DPC-R-40GE-SFP is for example RE-S-2000-4096 still upgradable with recent Junos software? Regards Johan