I have a Marcum 825 that I got for Xmas 3 years ago and an old Aquaview scout that's probably 15 years old. I'll admit I barely use the Marcum. The big color screen is a nice feature but if the water is stained it switches to b/w automatically and I find the Scout has a clearer picture in b/w. I also enjoy recording under water video and not being able to easily record on the Marcum 825 is a feature I really miss so it usually stays in the truck. I did pick up the Aquaview connect wifi on sale at Cabelas and set it up with the Marcum and it has worked well in my living room but haven't tried it on the lake yet. The Aquaview pvr has been convenient and reliable for many years. Not so sure the 825 is worth the steep premium. Seems like a bit of hassle having to use a tablet or phone to record but I'll give it a try. Worst case the Marcum will go back in the truck. Here's the link to the Aquaview connect.
https://www.cabelas.ca/product/10222...l-wifi-adapter