eurodono & brazytee:

Sorry you did not get an earlier response to your question.

1.    If you want your m-in-law to watch different channels from yourself, you'll need two Sky digiboxes.  I recommend a Sky+ DVR digibox for your viewing in view of the time change between UK & Oz.

2.    S/B classic PAL is a good choice, esp. as it's discounted so heavily. 

I have been slinging from UK to Cal for over a year without problems.  Sometimes (every month or so) you may need to power cycle your Sky box, or your router in the UK, or your S/B if things get hung up.

You'll need an upload and download speed of at least 800kbps to get a tolerable picture. 

Hiya - the solo and pro definitely have advantages for LAN streaming by way of better picture quality but over remote links I'm not sure it would make that much difference to be honest.  The discounted SB Classic might be a better bet.

As cymro says a PVR would be a good idea.  With the SB Classic it has a built-in TV tuner that would allow you to watch something via it whilst your mother-in-law watched a different channel on Sky, but you couldn't watch a different Sky channel each.  However with the time difference and a PVR it probably wouldn't really be an issue.

Homeplug would do the job fine - I'm using the 200AV Solwise ones and they work brilliantly (although the 85Mbps models would be fine too).

The main limiting factor you'll have is the upload speed at your mother-in-laws.  I've just gone from 230-odd kbps upload to 340-odd kbps and noticed a definite improvement.  If you can get above 500kbps then you'd get a pretty reasonable picture full screen.  Unfortunately it'll just depend on what ISP options are available at your mother-in-laws.

Let us know how you get on!

Cheers

Alan