I own a phoenix and my brother owns a TSI. So i know the differences. I'd go with phoenix not to be a whore just cuz i own one, its just a really clean, and dialed deck. it can tailwhip easily not like a tsi, its strong, an i prefer the headtube angle. Makes me more comfortable with certain tricks. sure its only .5* less steeper that a TSI but it makes a huge difference. i also dont like really long deck like the TSI cuz im kinda small, so i got the phoenix. oh yeah and the phoenix brake system is so easy. i got the bolt through the brake and spring with my bare hands. Its pricey, but i got mine for xmas so you kinda have to think a little. id get it