You gotta state your budget or we can't be of much help. So before blindly throwing out the name of my favorite 5 string as the perfect one for you, here's my usual 'first 5 string' advice.
-Play as many as you can. 5 strings have many, many more differences between models than 4 strings: String spacing, scale, nut width etc... Usually something will feel 'right'.
-Based on playing, find the scale you are comfortable with. Some will insist you need a 35" to get a good B. Others disagree (me included). However, the IME most of the crappy B strings I've found were on cheap 34" basses.
-Find the string spacing that is comfortable for you. Some folks like narrow, some like wide. Those who slap often prefer wider spacing (3/4" - 19mm), others prefer narrow (~16mm-17mm). There's no right or wrong, it's just a preference.