it's all in how you use it...
I currently have a 9 foot mesh satellite dish.
Would I be able to receive more free digital or hd channels if I upgraded from my 9 foot to a 10 foot or 12 foot dish?
If location is a factor I live in central Texas. Thanks.
The only thing I can add to the above responses is this....
If the condition of your 10/12 foot dish is better than the 9' unit, or the motor/mechanism is better, then by all means get the good stuff on line.
I believe there are a lot more things than just size that matter, when it comes to BUDs.
So, moving up from a hail-damaged dish might help.
Changing from a dish with a wobbly mount might help.
Definitely changing from a dish with few counts per bird will be necessary for accurate KU reception, though you may be able to mod your old dish.
Personally, I'd kill for a dish with a horizon to horizon motor setup (H-H)
Using the appropriate (best) LNB/feedhorn on your chosen dish can get you a LOT more signal!
If you find your 9' performance is lacking, you might give it a proper mechanical tune-up and re-alignment and see a big boost.
And as a last resort, try this:
Put up all three dishes, and then compare!
I have room for two BUDs, and wouldn't say 'no' if someone offered me a better one than I was using.
On that point, I'm in full agreement with rv1pop:
But, if the question was upgrade "with" a 10 foot "and" a 12 foot I would holler --- YES!
What kind of 9' dish do you have, and how is it outfitted?
What kind of 10/12' dish do you have available, and how are they outfitted?
Pictures would help, of course.