endlinks break down in to two main groups (as far as you should be concerned, and to ease this discussion):
spherical bushings or solid bushings
Typically, solid bushings are cheaper, make less noise and are better options for the street. Spherical bushings require more 'up keep' and tend to be included on adjustable types....which you do not want.
Kartboy is the "standard" when it comes to solid endlinks, however, Perrin just released their own version a couple months ago that seem to have good reviews.