How far do you want to go in the future? what are your current mods?

 

Both will do the job, but, you can max out tha stock fuel system with the twins at around 370odd rw HP, so if you go to a single turbo you would need bigger injectors to get the full benifits of a isngle turbo upgrade. personally i prefer the haltech, but the apex would suffice i think, the haltech would release more HP due to finer tweaking