You can choose another mighty or a cheaper mini. The mini is probably the best as it streams any recordings from the mighty as well as any fetch channels / sports tv.
Note Optus like to use the word "purchase" a lot on its website (which is almost certainly misleading and deceptive conduct) but all Fetch boxes must be returned to Optus if you ever leave. All content purchased via Fetch will go if you ever leave. You are leasing, not purchasing.
We do have a mighty fetch Optus set top box and watch the English premier league non stop we are unsure whether to obtain another one from a family spare. How much would it cost to watch the set top box from another room would it make any difference to our monthly bill sincerely Jacqueline and John
Multi room only work with like boxes. So you'd have to have two optus boxes or two shop boxes.
Also Don't buy cheap Optus boxes off eBay as they're still OPtus property and likely to have been disabled.
Doesn't matter if they're mini or mighty though.
PS You appear to need work on your signature?
Yes, it'll cost you. I believe it's either $5 or $10 extra per month