well I personally would get a GSR its a better faster engine, unless you wanna do the LS/VTEC swap you will wanna rebuild it before you drop the VTEC head on it anyway. I would just get a GSR and get the list of things you have for the GSR instead of the LS.
Also short ram cold intakes dont exist...its cold air or short ram...
Also a header isnt the easiet thing too put on you have to take the engine out I believe.
Anyway good luck