Provided that the extra depth and bulk versus a traditional AIO aren't an issue, the OptiPlex 7060 SFF, in its AIO arrangement, is a commendable alternative if you want an AIO with future-proof potential. It's no slouch standing by itself, either.
Powerful overall performance in our test config; Reasonably priced; Good expansion capability; AIO stand offers flexibility not found in traditional AIOs
Fans can get loud when system stressed; Bulkier, deeper than a traditional AIO