Both lenders allow for upfront valuations but you need to ensure you can service the lender with that lender (particularly Suncorp which is a very conservative servicing lender).
Don't put the cart before the horse. Have a strategy in place before you start ordering upfront valuations.
Get a second opinion? There are heaps of brokers in VIC.
There are some smaller tier lenders that have more generous servicing criteria/calculations.
I would consider doing this sooner than later before the remaining lenders start changing their policies.
Have you been advised of what sort...