I?m not shure which modul I should suggest.
What is the difference between the ACE10-6500-k9 and ACE20-mod-k9?
All I can find on cco is a that the 10?th modul has one led more.
The ACE10 does support 16GB, with caveats.
To get 16GB out of ACE10 you can only have one supervisor in the switch located in the secondary sup slot. The ACE10 must be located in the slot belonging to the primary (first) sup slot. You will need to reboot the switch after installing the 16GB license.
ACE20 is the exact same hardware as ACE10. Only difference being all limitations above have been removed. With ACE20 you can get 16GB in any slot, with one or two sups, and no reboot required to upgrade the license.