So, I've been down both roads and am totally with you. I had a very similar grow, using a trellis and around 30 tops.. It was a mess but my harvest was massive. A lot of resources waisted on the lower buds, but all and all it came out very well.
When moving to a mainline, my harvest suffered greatly, but the quality of my colas were amazing. 8 massive colas in a circle that looked almost identical. So, I got some quality over quantity and a very symetrical grow out of a mainline.
So now, I'm thinking of trying a 16 cola mainline heavily chopping all of the lower buds (lollipopping)... This way, I'll only be concentrating on the tops-- Seems to me the tops of the tops are the best a bud can get, but hey what do I know, I'm a newbie.
Here is Durban Poison out of control... 1.5 x 1.5 x 3 ft...
I over did it just a bit ! Shoulda chopped the lower growth heavily...