I think it's always safe to go with a major so SGIO, QBE, AAMI, etc. We swapped to AAMI earlier this year for all our insurance as their prices were significantly lower than SGIO who we were with at the time.

Definitely shop around, prices vary a lot! 'Youi' seem quite good as they really consider your individual circumstances and they are advertising a lot lately with great rates.

Bundling is good but you don't save much, usually 5 or 10% but often you can get a much bigger discount than that by going elsewhere.

Good luck, it's quite confusing.