I have been using M1 0W20 AFE and PP 0W20 in my daughter's '15 Impreza, no apparent oil consumption and it has ended up being about $12 per jug after rebate.
I'm sure ST 0W20 synth would be more than fine in this engine if you don't want to deal with a rebate, but it seems like that grade is often not stocked at my local WMs in favor of 5W20. QSUD is also a good budget choice without a rebate.
I used a Wix 57055 on our Impreza once when I could not get OEM quickly enough and, like the one I used on my own vehicle, it seeped oil from the gasket during the OCI. The one on my FXT seeped no matter how tight I went on it and I noticed when I removed it that there were molding ridges in the seal...I am absolutely done with those Wix/NAPA Gold filters. I have used the US Subie blue cans, thee types of Tokyo Roki filters, and K&N with no gasket issues and am 0 for 2 with the 57055. One of the K&Ns I used did seep a tiny bit of oil from the hole through the nut on top.