Having done all 4 US BB lines:

1st time do Brooklyn->Cleveland->Baltimore->Alaska/Guam->Colorado->South Dakota->Iowa->Montana-Nebraska
2nd time do North Hampton->New Orleans->Nevada->Pennsylvania/Remod->North Carolina (Stop here since your 1st BO should go all the way and the 2nd BO only should level up til your gunlines are set)
3rd Time North Hampton->New Orleans->Nevada->Tennessee/Remod (Stop here since you already have the North Carolina. Just grind up so the lines are set)
4th Time do Brooklyn->Cleveland->Baltimore->Alaska/Guam (This should be hell of a lot of fun after doing it already before plus the other 2 lines)->New Mexico/Remod (Stop here since you would already have the BB3s.


This is how I did it and how I would recommend anyone else to grind the 4 USN BB lines.

Also grinded a CV between 1st and 2nd BB BOs. and powerleveled a sub BO to lvl 105 for the hell of it between 3 and 4. 

APA BO was powerleveled with 2nd CV BO after the 1st CV BO hit 65 


And that is how I've completed USN, All EBBs, the ECV and All premium ships included. 



Be aware of which BB line you want first, sure the 30 degrees on the New Mexico, Penny, Nevada and Mark 7 equiped Tenny are easy to learn, but the Iowa and Montana are 45 degree gunned ships and the Nebraska uses 40 degree guns.

Your first line should be the Colorado/Sodak line, it is the easiest of the 4 grinds for a new player since getting used to the 45 Degree guns makes 40 degree easy to learn, plus the Iowa and Montana easier to adjust to. A major issue I see with new players going up the Norcal line is they can't adjust quickly enough to the 45 degree guns on the Norcal and suffer trying to relearn the playstyle of heavy hitting long hangtime compared to short and consistant. 

Why post such long winded replies to a necroed topic like this?

Ive used both and it really depends on what you want, brooklyn has the advantage in gun ammount but northampton in size, what i did i used a remodel of atlanta the Juneau II and i put 6inch twins on iit, i used it to get to lvl46 for New Orleans on my Northampton line but brooklyn line is perfect for blitz. i personally have the northampton line BB3 North Carolina and i think its pretty dam good but hey its up to you.

lol chris,  how does the northampton have the advantage in size over the brooklyn?

brooklyn is skinnier, and it is the only reason how you can get in range with the trip 6"s.  And of course, hobbit maps made brooklyn much easier to play with. 

But if you plan on playing the US CAs well, northampton is a good way to practice, as it has more range than the brooklyn (although not by much), and the guns require better gunners to shoot well. 

Personally, I still love using the lvl 30 dual 5"/54 cal Mark 16 Ls on the brooklyn, giving me better range than the trip 6"s as well as more damage (per shell).  Yes, it is hard to aim with the high angles and requires decent gunners (bve) to adjust fast, but it is just that much more fun to play.

I would reccomend the brooklyn line, call me crazy but I enjoyed the alaska, and DO NOT I repeat DO NOT get the new mexico, the colorado is 200% better and 200% better looking.