Hey man, as for bang for buck first mods.. It really depends on what you're looking to get with your car. I like a blend of looks and performance, without making the car undriveable as a DD. High on my priority list would be new struts and springs, and maybe an intake. Basic lip kit looks good with a drop, rims or not. Of course that's all subjective
Depending on past maintenance some of the best stuff to do is just catchup on maintenance.
So far my favorite tune up duties have been a MAF cleaning, and new spark plugs. Pulls nice and strong now