get separate shorts & top
If you're only going to get one tri outfit, I'd strongly suggest getting separate tri shorts and tri top, rather than the trisuit. That way, during duathlons or bike-run brick workouts, you can wear the tri shorts with ANY choice of top. Sometimes you just won't feel like wearing a tri top in those situations - you might want better sun coverage, for example, or a shirt that's looser and more comfy.
The tri shorts and tri top don't have to be from the same company. Zoot tops, for instance, fit me great, but Zoot shorts are absolutely terrible, because I have hips.
I absolutely love Shebeest tri shorts, which ARE designed for people with hips (and not-skinny thighs).