How do you take care of the filters?  Do you chemically clean and rotate?
I would suggest you get a 2nd set now.  Clean the current ones.  Keep them.  Next time you drain and refill install old ones and clean new ones.  I am told having 2 sets and letting them dry extends life of filters.  Also, no downtime while waiting for filters to soak overnight.
I would probably stick to original filters.  However, we have many customers who have upgraded.  If you want the added convienence of cleaning in dishwasher, go for it.   
