If the Playaz N1 were designed with reasonable amount of bass and they could be the steal of the century. In reality I can recommend them for EQ-friendly folks only - stay away if your source does not have a good, user customizable EQ.
Merkury Innovations Sport Ear Buds (Assorted Colors)New Sport Headphones were designed for the athlete in you. With Vertical In-the-Ear design and non-slip silicone earbuds, these headphones will fit securely and comfortably even when you're at your most active. Three pairs of soft silicone ear inserts ensure a perfect fit for nearly everyone.