I am looking at purchasing my first above ground pool have looked at a couple of places and feel overwhelmed with all of this information and choices i am currently looking at a 18x40x52 oval pool from thepoolfactory it is the saltwater 5000. Is this a good pool? I am not wanting to do a saltwater system, do to it being close to a metal fence. what kind of pump and filtration system would be best this pool is 19,000 gal? What type of chlorination system should i buy? Is there anything else i should buy right away?