Entry level? lol I've tested them against headphones that cost $300-$400, and it wiped the floor with them. The only headphones under $1000 that I'd even consider aside from the K55X series are the new Blue headphones, Sadie and Ella. But they are $400 and $700, respectively, where I can now buy the once $200 K550s for like $105 on eBay.
Headphone Reviews and Discussion - Head-Fi.org