Rikon definitely makes good equipment. I wouldn't have any problem recommending any Rikon gear.
650 CFM is the low end of the dust-collector market. (I have an 1100, and wish I had the space for another.) If you run it with only one machine at a time, it will do fine. Don't try to hook it up to every machine you have at the same time, because that definitely won't work. These collectors are mostly all pretty generic. Essentially the same model as that one can be found from Delta, Jet, etc. as well. As I recall, Lowes wanted $149 for the Delta version, so you might check around for prices (but 170 isn't bad). Remember to save a chunk of budget for the hoses, fittings, etc that you will need.
If you are willing to spend a bit more, I would suggest looking into the "canister filter" collectors. Instead of cloth bags top and bottom, they have a rigid top canister with a pleated paper filter (like a shop vac), and a heavy plastic chip bag on the bottom. These are MUCH easier and cleaner to empty than the messy cloth bags. They flow a bit more air too.
If you will be using tools that create a lot of large chips (like a planer or jointer), you can improve the performance a lot with a "chip seperator". It is a plastic lid for a steel trash can with fittings for the 4" hose. You put it in the line before the collector and it seperates the heavy chips (like a cyclone collector) before the smaller, lighter stuff goes into the collector. This saves wear on the collector (since the heavy chips don't get pulled through the impeller), greatly extends the bag fill time, and is often easier to empty.