I've been using Mag pumps for years without issues.
Here is a link to prices just as a reference point....I would say a Mag 9.5 will be more then sufficient to transfer water. I use 1200, 1800...price was right at that time but are over-kill in my 65g tanks used to age water but very fast.
https://www.marinedepot.com/powerhea...upreme-ap.html
...Ralph