Yeah, 29L is probably too low for the waves I surf + my weight and ability. I've found that 31L is good, both my alternator and spitfire work good with full wintergear (check out Xcel drylock 5/4, really warm but a lot more flexible than the 6/4 suit). I actually think that when I'm in my thick and heavy wintergear the waves usually have a lot more push/power in them than in summer... so although I'm in a thinner/lighter suit in summer I normally need a board with more width&volume because the waves are a lot weaker.
I end up using my 5'8 spitfire in almost everything, when I'm not on my Sweet potato... so what I'm considering is to replace the alternator and spitfire with something that gives me speed like the spitfire but surf a bit more traditional like the alternator. The alternator is a great board, but it needs better waves and I want to maximize my wave count from every day we get surf in this inconsistent place..... UK is blocking all the good swells from W and SW ;)
Sub Scorcher and CC seems to be a bit similar, but CC might be a bit more refined and could work better in good waves? At least the tail seems to be narrower and the boards isn't as wide.... seems like the sub might have a bit more flip in the nose though ?
I also like to keep my boards as short as possible, so to have a board that is 1 or 2" shorter is usually better for me :) Not writhing off the Sub, but a review from someone who has tried both would be great.
What size spitfire did you have?
The vanguard looks so sick, tell us how it goes! :D What conditions are you planning on using it in?