Top of Rack SFP+ 10Gbe switch recommendations for half rack

I'm not a network engineer or even sysadmin, so please bear with me.

We're looking to add 10Gbe capability to our half rack and I was hoping for some recommendations for a pair of Top of Rack switches.

We have a half rack at a colocation facility, with 4 hypervisors, 1 NAS with 4 x 1Gbe RJ45, a new NAS with 6 x SFP+ 10Gbe ports, and a pfsense XG-7100 appliance with 2 SFP+ 10Gbe ports.

Each hypervisor has 4 x 1Gbe ports, and we intend to buy SFP+ 10Gbe PCIe cards for the hypervisors, at least 2 ports per hypervisor.

Our current switches are 48 port RJ45 1Gbe Cisco 2960-S switches stacked. The model we have has 4 x SFP 1Gbe uplink ports, so we don't have any SFP+ 10Gbe switch ports.

We don't need fancy features but L3 capability is a must (we'd like to be able to give the switch an IP on each VLAN) and we'd like to have 2 switches for redundancy. The assumption is all recommendations have some link aggregation, DHCP relay / proxy.

Our intent is to continue using the Cisco switches for a little while as we won't be able to get into the colo to rewire everything. So what we want are switches with plenty of SFP+ 10G and 1Gbe ports.

I'm also curious as I read that some switches support both 10G/25G. Are such SFP ports compatible with adapters that only support SFP+ 10Gbe?

Budget wise, we'd like to get the best bang for buck possible but need reliable workhorses that will last many many years - I'd say $2-5k max per switch is within our budget.

Any help is greatly appreciated!