Thanks for all yours answers, but know i' m a little bit confused, if is better for my game, buy a i2 or i3, i' m star playing pool with snooker cue, like 8,5 mm tip, with european taper, and be perfect, in 8 feed tables, and no so good in 9 feeds tables, but a parter of club say to me, better buy a pool cue, with 13 mm tip, and buy the Mcdermott Dubliner.
Sometimes, i use the snooker, and be great, but no is the best for long shots, and i' m a little bit worried if i buy a i3, fail some long shots, or be needed have other cue mounted for a long shots. Actually i' m training in 8 feeds table, but in most numbers of clubs people play at 9 feeds table and here i find much more difficult for play with the snooker cue, for have more long shots, but i think is practice.
I' m not advanced player, just start few months ago, playing seriously but i train 1h or more for day.