Where to find this hair straightener and which one?

k so i need to get a new hair straightener, and im deciding between the chi and the solia. the chi is everywhere in stores, and i cant find the solia in the stores that i look at like ulta. so im still not sure which is better, the chi or the solia, and the only place i can fid the solia is online, www.folica.com which also has the chi, for less than what i saw at target and places like that. so plz hlp!! thankss