#2
Might I suggest, the blackheart matching 1x12 cab?
Gear:

Guitars
Martin DSR
Taylor 214e
Fender Strat
Epiphone 335 Dot
Carlo Robelli Acoustic

Amps+Effects
1978 Fender Pro Reverb
Boss Blues Driver
Boss Super Overdrive
EHX Holy Grail
Boss DD-20 Giga Delay
#4
Looks somewhat like a typo to me. Just go by the speaker is rated for. The pwer is coming from the head not the cab. For example, if you put a 5 watt head through a 100 watt cab, that doesn't make it 105 watts. Thats just its power rating, and how much power can be ut through it without damage being done to the speaker. I hope this clears it up for you a bit.
Gear:

Guitars
Martin DSR
Taylor 214e
Fender Strat
Epiphone 335 Dot
Carlo Robelli Acoustic

Amps+Effects
1978 Fender Pro Reverb
Boss Blues Driver
Boss Super Overdrive
EHX Holy Grail
Boss DD-20 Giga Delay
#5
i'm confused about this myself. i was thinking about getting a blackheart or valve junior 1x12.

how would a 70 or 75W cab handle a 50W amp? What about a 100W amp with tubes pulled to it's running at 'te equivalent of 50Ws'?