Anyone switched from the Sonic 2 and regretted it? I had sonic 2 15m, 13m,11m now soul 18 15 12 10 no regrets, i bought a 6 m first, then was so impressed and bought a 10.......then thought i should try the 12........hey then maybe 15.........and why not the 18......... i returned the 6 , as i use t...