I think two is more than enough. Fact is that over the last 10 years or so, some teams have gone without an import and some have gone with just 1, with both options experiencing varied success.
I think that we need to keep options for both young up and coming players but also those Aussies on the periphery that just need a chance or even a second crack. Look at what such an opportunity did for Daniel Dillon this past season. And is was great to see a discarded player such as Graeme Dann reinvigorate his career at Sydney.
We also need to keep in mind NBL teams depth charts are far better than what they were 5 years ago. Most teams could easily go 9 if not 10 deep now. I would argue with the 40min scheduled, they probably don't need to barring injury.
Also, keep in mind the talent that is likley to head back to Australia over the coming 3 years from Division I college hoops. The following 6 players graduated this past season and are looking to hopefully secure their first professional gigs:
Anatoly Bose / G / Nicholls State / Sydney, NSW
Ben Dowdell / Sr / F / Santa Clara / North Nowra, NSW / AIS
Brad Kelleher / Sr / G / Hofstra / Hallam, VIC
Ben Louis / Sr / G / James Madison / Dandenong, VIC / AIS
Chris Clausen / Sr / G / North Dakota / Adelaide, SA
Graeme Radford / Sr / C / Stetson / Moe, VIC
Bose is likely to head to Europe as he has a Euro passport (born in Kazahkstan) but grew up in Sydney. If I were the Kings I would be pushing hard for his signature in any case...
Dowdell would be a great pickup to provide solid minutes as a role player off the bench. Maybe Adelaide to get him on board to play alongside his brother Jeff or Sydney can look at him as another (relatively) local player?
Kelleher and Lewis are worth a look at by teams. Kelleher got genuine starter minutes this past season at Hofstra. Clausen and Radford may be stretching it a bit at NBL level...
The following year, these are the Aussies at this point expecting to graduate from Division I schools:
Akinpetide, Femi / F / Sacred Heart / Northeast
Baldwin, Illiwa / C / Nevada / Western Athletic
Duinker, Josh / F / Richmond / Atlantic 10
Iliadis, Trian / G / Old Dominion / Colonial Athletic
Massey, Matt / C / Southern Utah / Summit League
Steindl, Clint / G / Saint Mary's / West Coast
Tomlinson, Nate / G / Colorado / Big 12
Witt, Cameron / F / Valparaiso / Horizon League
Steindl and Tomlinson are class acts and have already been starters at solid Division I schools. They would be viewed as potential starters in the NBL and could contribute in some shape and form immediately. Iliadis has been getting genuine backup minutes on a very good NCAA tournament team, whilst Massey and maybe even Duinker are worth a look at for NBL level given their size and scoring ability.
And don't forget guys like Dellavedova, Young, Page, Motum and Brokehoff for example will be looking at returning just 1 year later...there is some serious talent to come back at some point in time.
Maybe David Andersen will come back and play a season or two in the NBL before finally retiring? Matt Nielsen may do the same too.