Brent i have this
Grizzly. Was $199 when i got mine and i bought it on price. It has three speeds a remote albeit not the greatest it activates when my lights come on but thats no problem. It has a timer for end of day shop cleaning.
The most amazing thing i experienced with this unit was while cutting walnut which gives off quiet a distintive smell, it filters the air to the extent that i did not smell it.
You need to size according to your shop and consider noise although mine i dont hear when i am wearing ear plugs.
Filters are the biggest issue. There is two stage filtering. Second is designed for the really fine stuff. The way i am using mine is unfair to comment on the filters. Note the manufacturers have all engineered buying boxes that are ever so slightly or completely different in size so you stuck with the original OEM for the filters. I have found a place locally that manufactures custom filters at a reasonable price and when i have hooked up my dust collector i will be more diligent with the second stage filter.
For the front end i now save a ton of cash and use a 3M filtrete material available in sheet form (folded in a plastic bag for around $16). I cut two pieces the neccessary size and lay them over each other.
Then i salvaged a filter frame from a 3M furnace filter set up that has been discontinued in Canada at least. ( probably was way too effective and cheap) and i cut the frame down to size reglued it together and now have a frame which folds open and i lay the filter material on the plastic grid and close the frame on it.
This allows me to really use the unit and dispose of the material more frequently than i would if i was paying for actual filters especially from Grizz with shipping etc.
You need to consider turn over of air and size accordingly and also consider the quality of the second stage filter.
I would like to find an after market or oem filter manufacturer for real quality second stage filters.
For me mine works great in the midst of not having my dust collector hooked up.