I think you chose wisely with the tc50. I also own an Orange rockerverb mkii, I love the orange, great amp indeed but to me it much closer to a one trick pony. It has some great high gain tones along with a very nice clean channel but seems to lack in the lower gain area.
It struggles with many pedals for some reason unlike the tc50. There simply are many more usable great tones to be had out of the tc50.
The orange is great at the high gain marshall tone with its own orange flavor.
The orange also seems to shine when the volume is up quite a bit where as the tc50 sounds great across the board.
I'm sure the the cab and speakers you have will sound fine with it, I've tried all kinds and they all have sounded great but with their own flavor, only you can decide what is best to you. I mostly run a couple mesa 1x12 3/4 open backs and it sounds excellent.
Maybe something to remember here is, the tc50 was designed to be used with vintage 30 speakers and I can't say they got that wrong.