I ski park whenever I can (since my home resort's park sucks) but since I mostly spend ski at that home hill all mountain will definitely be a factor. I ski in southeast Idaho and Utah.
I'm about 5'8 and 150 lbs.
I think the main difference between the Thall and the Jeronimo is that the Thall is a hardcore park ski while the Jeronimo is designed for both park and all-mountain (which is what i'll be doing). Also rocker is another big difference.
Price is definitely a huge factor, so what I'm asking is can anyone give insight to these skis and are the Jeronimos worth the extra cash?