[JKT]

OmniFocus is not really project management software. It is a personal time management software based on the Getting Things Done philosophy. It could still be useful to you in conjunction with e.g. OmniPlan in terms of helping you to determine what you need to do (and get done) each day, etc. but if you are planning a project involving multiple resources and people (which it sounds like you are), then you need something more akin to OmniPlan first and foremost so you can set time lines and prepare Gantt charts of how resources need to be used, what deadlines to set and when to meet them, etc.

OmniPlan is OmniGroup's own project management software (click the omni logo above to see all their products). I haven't used it or had a reason to use it, so I don't know if it is good or if their are any competitor products to try either.