Concerning the surface grinder......I would recommend watching Harbor Freight sale things that come in the mail. Before I purchased a surface grinder I did about 6 months worth of research on them, and it all finally lead me to a company in San Fransisco, that imports surface grinders. I called the outfit, and after I convinced the gentleman that I wasn't interested in becoming an importer, he started talking to me. He stated that nearly all of the 6x12" surface grinders that enter the U.S., do so through his business. He also told me that ALL of the 6x12" import surface grinders are built on the same factory floor/barge. He stated that the machines arrive to him in crates of 36 machines. His people go down a list, counting out how many machines each retailer has ordered. Based upon who the retailer is, some machines are unpacked, painted in a portion of the warehouse, labels applied, then they are re-crated and shipped to the retailer. When I asked about Harbor Freight machines, his response was..."We don't even uncrate those, we just count out what they ordered and forward the machines to them."
I asked a lot of other questions, but it boils down to the fact that all the 6x12" imported machines are basically the same, with the same motors, mechanisms, etc. The difference between a $999 Harbor Freight with free shipping, and a $2400 machine (plus shipping) from one of the other retailers, is nothing more than a paint job and some labels.
I've been running my 6x12" Harbor Freight surface grinder for over 5 years now, with no issues.
More important that the brand of machine is that it be set up correctly, and that you obtain a QUALITY mag chuck for it. That's the pricey part. A quality fine pole mag chuck in 6x12" new, is going to be $600+ easy. At first I purchase a 5X10" Suburban fine pole chuck, and at that time the best deal I could get was just short of $500. When I outgrew that chuck, I took the time (and the chance) and found an older 6x12" fine pole chuck on Ebay. Got it for less than $250, and have been using it ever since.
All of this information pertains to 6x12" import surface grinders. I've not researched other sizes, so I can only relay what I've discovered with these size/type machines.