Always pulled wing low in the E175 as well, never had an issue and flight safety taught it to me that way. I think 15* bank is when the book said you'd start scraping metal. Got to the CRJ and the sim instructor had a fit when I tried to land it wing low. I think it depends on the amount of wing sweep as the CRJ sweeps more than the 175, idk what the wing sweep in the 145 is but it looks fairly shallow.