looking to replace old AGMs with some lithium batteries. Want recommendations for good quality ones, Pure Energy look ok ?

I got two 100ah Lithium batteries and upgraded Victron MPPT controller from lowenergydevelopments in Melbourne. Went to the shop and selected the gear. He's been in business with shopfront for a number of years. Also on eBay.

I second Low Energy Developments, I bought solar panels, Victron MPPT and Lithium Batteries (drop in replacement for worn out AGM's ) about a year ago, good company to deal with and help is a phone call away.
Sometimes their ebay store is cheaper than their online store.

cheers, I will check them out