Everyone has an opinion on this one, and it is hard to go wrong with any of them, but here are my thoughts.
Everytime I make a change, I get all giddy and swear that that last modification is the best yet, and that I should have done it sooner. Truth is, your memory is only about as long as the latest mod. Be that as it may, in the beginning of every virgin car project, I look toward making the most noticeable difference for the least buckage. As you will eventually continue to modify it, it´s really not quite so critical where you start, since, we all know, you will eventually get to just about everything, given time to earn the money.
For my lettuce, handling and exhaust are the first moves, since regardless of whether you are racing, or not, these changes will always be noticed by the driver. Sway bars make the biggest change for the least dollars, in my opinion, especially for an LX. Not only will you notice improved handling, but bars will not negatively effect the ride, or cause clearance problems. As for the exhaust, nothing gets my blood going more than a sweet exhaust note. Regarldless of whether it actually gives you improved performance, or not, the perception of improved performance is almost as important. Both of these mods can be done for minimum dollars, will not need to be tossed when other mods are made, and do not compromise the reliability, or comfort of the car.
On the subject of modifications in general, any time you consider a mod, do your research. Learn how and why the parts make a difference, buy the best products you can afford, and, whenever possible, do the install yourself, and you will enjoy the experience and the effects far more. Don´t be like so many Honda girlie men (sorry, ladies) who know not why anything works, they just have to buy it because someone said it was cool, and then pay someone to install it. The goal, in my mind, is to not only enjoy the finished product, but to enjoy and understand the process, as well. Over time, you will, then, become a mechanic with actual knowledge, not some trash-talkin´ punk, who has little actual experience, and only regurgitates what someone else told him.
Happy modifying.
Marcus