Welcome to the group!
I can't suggest a better carb. The stock one was very capable!
I'd be interesting in seeing any pictures you have of your work so far. I love projects like this!
Currently Running Stable:
2010 Honda NT700V
1986 Shadow 700
1986 Honda Trail 110 (Postie Bike)
1987 Honda Rebel 450
1973 Honda Mini Trail 50