We've had Intex all vinyl pools for years. Now we are getting an AG pool that doesn't need to be put in the shed every fall. My pool (MGK pools- Lamark) has resin parts for just about everything, except stainless steel hardware, steel walls and an aluminum bottom track. We are getting a Reliant cartridge filter (1 h.p.)and some kind of salt water system. What type of SWG is more durable? They can save a lot of time (I like that!), but are costly & don't seem to last long (don't like that!)