If it's a straight choice between Arsenal and Pool then I can't see why he'd choose Pool over us. I guess all fans have rose tinted glasses so I wont be shocked if I'm proved wrong.
If, however, Pool want to include him a Suarez deal then I think it will drag on and on. Liverpool simply cannot lose Suarez, he is their team. Also do Barca still want him given he's a PR disaster? They have Neymar and Messi so they're not exactly short of attacking talent.
Man Utd will undoubtably also enter the race for Sanchez maybe even Chelsea as well.