I have twwo 1200 mods in my 135. They are NOT hard to mod. Only takes about 15 minutes to do. They put out a ton of water. There are a few things that need to be done right though. If those other pumps put out comparable flow I would go with them . I have over 50 bucks in each of my mods. 62 bucks ready to go is a deal.
62 bucks is the going rate for them, They have a 360 degree changable angle, and have magnet mounts. Plus they are smaller than the maxi's.
You wont be dissapointed with the tunze's.