im really liking my emax rs2205s 2300kv motors. these are the ones you see in the tones video above. all around good performance, efficient too. i also have the emax rs 2205 2600kv's on the ix5 with the broken arm. these run a little warm but fast! i dont think frames matter much other than weight and drag, what you like and think looks good will help your confidence. i havent tried the bolt, or any 4 in one esc's. i have had, and have right now esc's that need replacing for some reason or another. replacing 4 esc's when only one is bad gets expensive.