It really depends more on how you drive and use your Jeep and what model and mods you already have. Are you a point and shoot type of trail driver or do you pick a good line and crawl an obstacle? Do you mud bog, rock crawl, or beach ride?
I personally like the turbo but can't afford either performance booster. If you plan on keeping and continally modifying your Jeep you might be money ahead by just saving for a V8 swap.