Tuning isn't really needed unless you are adding boost. The best bang for the buck upgrades are sway bars, intake, exhaust, and pulleys. I think stock style suspension is better for a daily, but if you don't live around a lot of bumps or potholes then go for it (it will make turns even more fun). If you want to save money on an intake you can buy a cheap one off of eBay and get a K&N filter that fits (filters pods are usually $45-75).