What networking vendor recommended for a 250 seat co-working space?

I am working for a co-working space that has 2 branches that run ubiquiti and cisco gear separately.

We basically found that the cisco gear is too expensive and ubiquiti has terrible support and are hitting the limit of features that we need. Thus we are looking for possibly alternative vendors for our hew hub.

I know that we should is to use the same vendor across hubs but the network does not interact with each other and are currently managed separately.

We are currently looking at Aruba but are open to suggestions. The new site does not have congested WiFi channel and we have the requirements below:

• 802.1x + VLANs
• Multiple IP with some VLANs having dedicated IPs
• Some server colocation

Additionally what firewall could be recommended?

Suggestions are greatly appreciated.