1. You don't have to match pump & filter brands.
2. The Perflex is a pretty good filter, and will work well with a larger pool.
3. BUT . . . get the SMALLEST 2 speed pump above-ground pump available. You're just over-pressurizing the filter, and wasting electricity, with your current pump. This one -- 1 HP Powerflo Matrix -- is a good choice. If you want to upgrade to a in-ground quality pump, this is a good option -- Hayward SP2607X102S Super Pump 1.0HP 2spd -- but you MUST be careful to never run on high with your existing filter!
Either way, pumps will last longer if you put them on pavers or whatever to get them out of the damp, leaves, etc AND keep them in the shade, but well ventilated.
Bookmarks