It's a tough choice.
Consider that your truck is hardly worth anything now, it might net you 1-2k toward a new car.
Consider that with the mods you have in mind gas mileage will go down.
Consider doing some of that work (CV's, shocks, etc) yourself will save you a bundle, and is really not hard for inexperienced mechanics with a little patience and some friends that know what they are doing (us).
Consider that a 90's or so civic will cost you less than 5k and get darn good gas mileage. Might want to keep the rodeo to mod later, and get the old civic to put miles on.
Again, tough choice but try and outline all the points of what you want both short and long term, the pros and cons of each, then make a good decision. Good luck! <img src="/forums/images/graemlins/patriot.gif" alt="" />