I would also go with a Wii. Just know that you will probably need a Y-cable to use an external drive (even an SSD), since the Wii’s USB ports max out at a pretty low current.

I think that only a small number of Wiis were produced that don’t support GCN games. It should be easy to tell by looking for the 4 GCN controller ports under a side flap.

SATA modded Sony network adapter (it must be an original Sony unit) with a 1TB or less SSD (for compatibility reasons)

Is that 1TB compatibility issue with SSDs or with PSBBN? I’m using FHDB (basically FMCB on internal storage) and OPL with a 2TB SATA HDD without any issues. My understanding is that 2TB is the limit with this setup.