It isn't by accident that Toyota's are so popular as a back country vehicle all over the world, it certainly wasn't because they were sold cheaper than other auto makers vehicles.
Do you see many full size vehicles out in the back country?, if not it is probably because they don't do well. Granted you can over come the short commings of having a heavy rig by fitting it with large wide tires, such as some 36x14.50's. However, for the price it is going to cost to get the Bronco capable with larger tires, gears, stronger axle and a lift kit to clear the larg meats, you could build a virtually unstoppable Yota.
Being a fan of a particular style rig is hard to get away from, and it will be hard for anyone to talk you out of it. I think if you really want one, get it, drive it to work, try wheeling it and see if it will work for you, only you can know for sure, however, don't sell the Yota until you know for sure the Ford is going to work out for you.
This of course only applies to all Broco's but the original. The only down side to the original bronco is that it is a heavy rig with a 3-spd tranny in its stock form. They can be nice classic dependable rig when properly built, or an anoyingly unreliable rig when built wrong. A wheeling associate of mine has the latter version.
If you have to sell the Yota to help fund the Ford, you should probably wait, unless it is a deal of lifetime. I have a couple of friends who have sold their Yota's for their favorite full size 4x, wheel the full size once or twice and quickly sell it to get antother Yota, and end up loosing a lot money in the process.