Well you you could. However there aren't that many T4 units with multiple wounds around I fear.
I personally prefer the Blastcannon since it makes you move your StormSurge around a lot more. I hate gunlines almost as much as I hate deathstars.
Also the threat of suddenly moving from S10 AP3 range into SD AP1 range often scares the *BAD WORD DELETED!* out of people.