Both, BU-353 by GlobalSat and GR-213 by Holux, are based on the same chip, SiRFstarIII. I wouldn't expect to see much, if any, difference in performance. I haven't personally tested GR-213, but I'm pretty sure it is as great as BU-353. And I tend to lean towards what kcflyer just said: "any mainstream GPS receiver out there will get the job done".