F5 BIG-IP VE new instances in Azure cloud

This is all basically a scoping exercise. If you plan to use up to 200Mbps of throughput, than you should be good. If using more, than you need to bump up the throughput. In terms of modules, usually the breakeven is at 2 to 3 modules, and in your case you are planning to use 3... so BEST bundle is generally a good choice. Finally, you could also consider BYOL as an option as well, and obtain pricing on this. Depending on your use case, it may be cheaper.