The bullitt suspension has had negative reviews by some, but most because they used the wrong kind of springs to go with Bullitt shocks/struts. If you bought the entire package, you get springs, shocks, struts, and swaybars. All of these are tuned to work with each other and can be had for under $400. Mostly very positive responses for those that used the whole kit (or at least shock/strut/springs) unless your looking for a great suspension for the track and/or strip.
I do mostly highway driving and long backroads, so I want a good ride and better than stock handling. I should have the Bullitt Suspension in my car within a couple months along with caster/camber plates and various poly bushings. This should improve my stock handling/comfort big time so I can enjoy my car more on trips and everyday driving. (for me, good alignment is a must cause tires=$$$)
Later on, D&D has a rear control arm package cheap for both lowers and uppers that I will install this summer along with possibly a new aluminum steering grommet.
I've not heard any complaints about bumpsteer with the Bullitt suspension and most say good alignments can be done without CC plates. A good alignment should eliminate most bumpsteer situations anyway.
X or H pipe??? You definitely need to hear both. No matter what, getting rid of the stock H will open up a few ponies and improve the sound. I love my X cause I rarely see/hear anyone else with one. I get a lot of looks with the Bassani and finally, most imports stay clear of me so I can drive in relative peace. H pipes have a classic sound and the X is just different, but not ratty or low-class. Bassani was nice cause the install was easy and fitment was perfect, but $$$ is sometimes a dealbreaker. I like both H and X, so no real bias one way or the other. I enjoy the sound of a good exhaust, no matter what makes it.