Just moved to a house that has about 200sqm of lawn (some parts undulating) and it's already looking in need of a trim only after 3 weeks. Looks like it's mostly couch, perhaps a bit of kikuyu, but not entirely sure (definitely not buffalo though).
Have a budget somewhere between $300-$450, prefer petrol (4 stroke) and a minimum of 18" cutting diameter. I could walk into Bunnings and pick one off the shelf, but would rather use that as my last resort.
Husqvarna - I just got a LC19 Husqvarna up and running - It was a hard rubbish find. nice machine.