Nubians can be really cool goats. Some are really good milkers and you can get some good meat wethers from Nubians. However, my experience with Nubians has been they are very needy goats. As in they need you to be around, they need you to protect them from the smallest bit of rain falling from the sky etc. I have Nubians, I love their ears. Speaking of ears, long drooping ears can freeze and get frostbitten very easily and then you end up with short goat ears anyhow......I have learned this from experience. Many Nubians are raised more for their color than for their other qualities like milk production. There are a lot of good milking Nubians out there but if you dairy type Nubians, they require high inputs. Again, go see what those Nubians are eating before you buy. Maybe they are out there chowing down of brush and doing well in a climate similar to yours. Then heck get some of those Nubians.
So here is what you need to think about. What type of climate do you have? Then you need to think about where the breed you are thinking of getting originated. Does your climate match up with that breed. If not, then if you still want that breed, you will have to do more work to on your part to have that breed be successful.
For example, Spanish goats ( I dont have any and haven't owned any Spanish goats) evolved in drier areas but were raised a brush eating goats. If you have a drier climate than Spanish goats would probably do well for you. You can find some Spanish herds that are more acclimatized to wetter conditions.
Another example, Boer goats were originally from Africa in a drier regions. They have been over bred for the show ring and put into a forage situation with low inputs, they probably won't do well. They aren't as parasite resistant/resilient compared to Spanish and Kiko breeds unless you are buying them from someone who has been keeping their boer goats on forage and has been culling for animals that can do well on forage.
If you live in a wetter area like I do in Ohio, Boer goats don't do well. Their ears are also long and droopy and easily frostbite in winter. I learned that from experience too. LOL
I eventually decided to try Kiko goats because they were developed in New Zealand which has a pretty wet cold climate kinda similar to Ohio but we don't have the mountains in Ohio like they have in New Zealand. I have been pretty happy with the Kiko goats and the Kiko crosses. I often breed a Kiko buck to my dairy does and get very nice kids. I am milking one of them now. She gives a half gallon a day right now since I am only milking once a day. When she is in top production she gives a gallon of milk on two times a day milking. She forages very well. Her mother was a registered Alpine. Some dairy goats will forage quite well, I have had Saanens and Alpines who forage quite well. I have noticed that the Saanens and Alpines need their hooves trimmed frequently. Another input. Do you want to trim hooves all the time?
These are all things to think about.
Ability to handle Climate Conditions
Parasite resistance/resilience
Ability to forage
Hoof trimming.
Fence jumping
yep I almost forgot fence jumping. I have shied away from La Mancha goats when I saw then easily jumping over 5 foot tale fences at the goat auction. LOL I am sure I forgot something, but I am sure some other people will bring up what I missed

Oh and if you buy goats that are already used to being confined by electro net then you won't have get them used to being confined by electro net.
good luck!