Breast pump opinions

We are expecting our 4th baby in December and the plan is to exclusively breast feed the first year. I will be going back to work full time after my maternity. I will have to pump 3xday, 3xweek. Also occasionally pumping at home to build freezer stash. I will be purchasing a breast pump again for this baby. My first and second I used the medela pump in style which worked decently but was loud(kind of annoying to me). My third I used the spectra s2 (pink plug in one). It was quieter. My issue was both were not super lightweight and I had to transport them both back and forth to work. I really want to try a different model or pump. I’ve been doing my research but want opinions from other moms to see which ones you loved or if you hated please comment. Things big on my list are: portability, not being stuck needing an outlet(our associate pump room often would be occupied leaving me scrambling and being offered places that had no outlet), efficiency(quickly yielding a decent amount) and feeling like my breast are fully empty . I was planning on just buying a cheapie bellababy as a backup since it’s super cheap don’t want it as my main pump.