I have a Nomad 45 1x12 for 5 years now. I just bought an F50 a week ago (probably got one of the last one available new here) primarily because I wanted to have 6L6s again and I only used channel 1 and 2 on the Nomad.
Though I liked the tone of the Nomad clean and lead, the F50 is a class above. Much more dynamic, single coil funky comping do slice through now, much more bass due to 6L6s and larger cab.
Much more headroom, the Nomad 45 was topping on the clean channel and starting to growl where I wanted real clean and needed an extra 1x12 cab to fill the room.
Downside is that the Nomad was topping on channel 2 too and that gave a fat lead tone I don't get with the F50, so I don't think I'll let the Nomad go (it's more portable too) but what I gained in dynamic with the F50 makes it up. And my bass player and my drummer like it too. 8)
I still need to tweek the F50 quite a bit but I feel I could get close to Robben Ford's tone too. Did anybody say Dumble?... well I said *close*
Cheers
Fabien