I think you are on the right track with the Summits. I have had the opportunity to use a variety of climbers and hang-ons. I think the Summit line is one of the most comfortable, durable and quiet to use. My current Summit Revolution almost allows me to fall asleep at times...notice I said "almost"...

Just out of curiousity, why the Goliath? At 240 you would still be way under the weight limit for the Viper level stands.