The tables and motors that come with a machine can be, but are not necessarily brand specific. While the table and/or the motor might say "Consew" or "Juki" on them, they are not necessarily picked for their quality, they are picked for their cost. As with all things, the older tables have some good things about them, but so do the new tables. The newer tables are generally made from countertop materials and are very nice looking with some nice features on them. The main thing to look for is a solid metal base, which is heavier and better made on old tables than new tables. That's not to say the new tables are weak, just not as beefy as the old tables. Here's a picture of a table I bought from Harbor Freight (about $130.00) to replace the one it is sitting on. You can see that the top has a nice plastic tray to hold bobbins and other odds and ends which is a nice feature. The top is two pieces of 3/4" plywood laminated together which is very solid and substantial, and is far better than a particleboard top. This was not the first table top they sent. The first one (second picture)was damaged on two corners and was absolute junk that was not at all like the top they pictured in their catalog. It has a decent metal base to it, but what it doesn't have is a tray under the machine to catch oil drips. When I put this table into service, I will have to figure out a way to deal with that. My other machine, a Consew 255 RB-3 has a Feit table under it which has a drip tray. The good news is that if you buy the machine from a reputable dealer, you will get a good table and motor to go with it. Beware of too good a price, it can mean they scrimped somewhere, and it will usually be the table and motor.
There is a wide variety of servo motors out there, some of them are junk. Some of the motors that the sewing machine manufacturers use are not very good, that's why when I bought the 255 I bought it with a clutch motor and then looked for the best value (not necessarily the best price) in a servo motor with features I wanted. I am extremely impressed with Reliable's Sew-Quiet 3000 (no longer available) and Sew-Quiet 4000 servo motors. That is what is on all three of my machines, and they have not given me one bit of trouble.
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In short, I would recommend buying a machine, table, and servo motor in person from a reputable dealer who can repair it and will stand behind it. I bought the 255 from a dealer 250 miles from me because of those reasons. The best part is that he also had one of the best prices on the internet, so I won in all respects, price, quality, and service.
BTW, steer away from the newer Consew 206 machines. They used to be made in Japan, and are currently made in China and their quality has suffered. My dealer told me this, and he sells them. Juki makes a very nice machine. It would be a Buick, and the Consew would be a Chevrolet.
