Optimize Cisco Layer 3 Switch

I have a Cisco Layer 3 managed switch running on its default IOS configuration, and I want its performance tuned for noticeably faster inter-VLAN traffic and lower latency across the network. At the moment... (Budget: $10000 - $20000 CAD, Jobs: Cisco, Linux, Network Administration, Network Engineering, Network Monitoring, Network Security, Video Conferencing, VoIP)