All of the above have access to the utility civvy line (Crane/Stork/H-lifter/H-tanker etc.)
Now, I'd personally like to see Liberty have a little more variation in transports. This ship fits the bill nicely.
Liberty has a huge gap in their shipline between the Mammoth and Mastodon that desperately needs to be filled.
EDIT #1: Just a quick note, to my knowlege, the Heavy Tanker is only sold in Frankfurt.
EDIT #2: And it's sold in Gallia for some strange reason... O_____________________o
EDIT #3: Also, I like the Heavy Tanker model, although I didn't notice it had hitbox issues. That's something of a problem if it does. Perhaps someone could come up with a model for that purpose.