An MBT (currently Abrams - and not many of those)
The M88A2 acquired with the 59 Abrams almost doubled (another 5 on order) - I wonder if this is a prelude to a purchase of additional Abrams?
Especially as these are now being distributed to three 'armoured cavalry regiments' vice a single tank regiment (& schools, of course).
I am just guessing here, not even an educated guess, pure speculation:
The RAN has just procured two LHD. These ships will, of course, be used when the need arises, to use their LCM--1E landing craft to land AFVs. Sometimes these LMC may need help to get off the beach. If each LHD was supplied with two M88A2, as BARV, these would be useful vehicles for both recovery of swamped AFV and to push LCM into deeper water. Additionally, as the LHD have a secondary use of disaster relief, a couple of vehicles capable of bulldozer, winch and lifting work would be useful for that scenario.
Then again, perhaps extra Abrams are being bought, as each LHD is capable of transporting 12 of the beasts, and with 24 at sea, that would only leave 35 on land....
If each LHD had a complement of 10 Abrams and 2 M88, that may seem like a reasonable number.
Anyway, what does the USA use for BARV? The Brits use the Hippo (heavily modified Leo 1).