I over research things, and had this in the run when I was looking Jan/Feb 2017.
I was able to talk to the service tech here in Houston, who works at a Leslie's that used to be a Warehouse pool, anyway he said to go tiger shark.
On the table was the 825, 9500, and tigershark. Note, some Leslie's do not sell the tigershark anymore, so that was showing he had no skin in the game and it was an service perspective. I think only the (formerly) warehouse pool stores carry them. Also, he said go 280 for pressure.
For me, maytronics was off the table since the closest service center is like 25 miles from where I live... that's about an hour drive and $10 in tolls.
If you have a smaller pool, a Tigershark QC would be fine. For my larger pool, I need to run it the whole 4 hour program to get everything clean.