i'd recommend doing suspension as one of the last things. go with performance parts first.
i've owned 3 preludes and i've always run into suspension. it was alwys one problem or another... whether it was tires going out faster than normal or whatever else.
if you do suspension, do it the right way the first time, and that can get to be a bit costly. (springs, camber kits, shocks, etc)
I would start out with some performance parts. buy parts that you know are compatible with both h22 and h23 engine. if you plan to keep the car long enough, you might just end up needing to rebuilt/replace teh engine. and what better to replace with than the h22.
So start off with intake, pulleys and exhaust. Header are not compatible between the two engines. (shamless plug: i have an Injen exhaust for sale, check classifieds for my thread

)
you can also do some interior mods since you spend most of your time inside the car rather than looking at it from the outside. you can work on sound, swap out for leather seats maybe. get pedals and shift knobs... figure out something for a cupholder.
people will disagree with me on this, but my personal philosophy is "go-fast first, comfort second, show-off last"