I would think that one on sale would do fine - I've been looking at that one for a month! It's 30L (7.9 gallons!)
Grinders Island Brewery - Pipeline
Bottled! Award winning East India Porter, Oatmeal Stout, Milk Stout, Saison fermenting at a nice controlled 85 degrees (up from 70) as it should be - weird isn't it.