Network design recommendation 10GbE or not

Hello!

I need your expertise designing a small/medium branch.

- 250-300 devices

- North-South traffic mostly (Our applications are hosted in our private data centers)

- Top business apps last 30 days:

- microsoft.com

- Office 365

- Sharepoint

- YouTube

- Windows file sharing

- Teams

- 1Gbps Internet circuit + 40Mbps MPLS

- We will buy 9X PoE C9200L access switches for PCs, printers, cameras, APs, phones, etc. Main room will have a stack of 7, satellite will have a stack of 2. 3-4 VLANs probably

- We will also buy 2X Meraki firewalls in HA to integrate with our SD-WAN solution

Now I have a few questions concerning the architecture itself if we should go 10GbE or not. We will run fiber between the satellite and and the main room.

Should we buy the MX95's and connect both stacks to them with 10GbE SFP+ ?

Or we can buy the MX85's and connect both stacks with 1GbE SFP.

Last option would be to connect the satellite stack to the main stack in a port channel (1 or 10GbE) and have a single egress point to the Meraki's.

I know that going from 10GbE to 1GbE can cause output drops but we can play with the buffers as per :

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-9300-switch/216236-troubleshoot-output-drops-on-catalyst-90.html

If we decide to skip the 10GbE ports all around we will save money on the C9200 and on the firewalls.

Thoughts ?

Thank you