Hi Burley, what I can tell you is that most shops will try to sell you what they have in stock and/or what they can make the most profit on. I NEVER ask a shop or retailer for recommendations because of this.
Regarding the 2 different EVO long arm kits you're inquiring about, the high clearance kit will have rear mounts that sit along side the frame rail, this as opposed to sitting below the frame rail. The later will give you better suspension geometry correction but they'll also get hung up on obstacles. Of the two, I would go with the high clearance.
With all that said, a double throw down system may be a lot more than you are needing or at least, based on what you've been saying. Yes, coilovers do make noise and for some, it's more annoying than they're willing to deal with. For the performance they provide, I don't even give it a second thought. I should note that they do need to be maintained as well so that's something you'll need to consider.
