I know that this has been debated a number of times, and I have read most of these debates. It seems that the majority feel that the Harken vang is a better choice. However, I have found the Holt version of the Vang upgrade and Cunningham/Outhaul upgrade on sale for a collective $350. The Harken Vang and Cunningham/Outhaul Upgrades together cost $610. I can afford either system, marginally, but I would like to get a second opinion on whether the savings are worth it, or if the Harken system is worth the price.