What Carb

You can install an electric choke onto the 1850 you already own. Low Buck.

How much tuning are going to do? (Or pay someone to do)?
That will be the key to getting max performance out a carb. It really doesn't matter which one. The Carter/Edelbrock style is a little more complicated to tune for those who just like to change jets, but many think it often is better out of the box.

So if your going to buy another one, give the Eddie a good look. If you want to use a Holley, just change the choke over to electric. Use the money saved for dyno time and/or help in tuning.