Record weights what type would be good for a Luxman PD171-A

Well first off like everything else you are well advised to listen and decide for yourself. Weights don't affect the motor hardly at all because the mass is all so close to the center it hardly makes a difference. The same mass in a ring around the outside of the platter would put a lot more startup strain on a motor. Physics 101.

Weights in general are the simple, cheap, and not very effective way of clamping a record. Also because of the way they work they have to be heavy. A reflex clamp by contrast grips and pulls against the spindle and so can clamp much more tightly without the need for mass.

Also record weights don't really do much to flatten a record. 

Either way, the one key element missing from most designs is a washer or shim that fits over the spindle and is just thick enough to sit slightly higher than the platter surface. The center of the platter is recessed to allow space for the center label area of the record which is thicker. So with many designs the more the record is clamped down the deeper it goes into this recess and the more it forces the outside of the record to cup up. Hard to believe, exact opposite of what you want, but a lot of them do this. Try a few and see.

A properly designed reflex clamp with washer on the other hand will press the record down onto the platter across the whole surface clear out to the edge. Even somewhat warped records are pressed flat. Record weights don't even come close.

I checked out some record clamp's and the J.A Michele seems pretty impressive. Also comes w/a washer. $59.99. Any good??

The LPS by Stillpoints might be the answer for you, although expensive at $549.00 they really do a nice job, has a bit of weight to it and is used without any type of washer under it. Music Direct will refund your money if not satisfied so really nothing to lose. Happy listening.

I checked out some record clamp's and the J.A Michele seems pretty impressive. Also comes w/a washer. $59.99. Any good??

Nobody knows. Seriously. Only you will know, and only then after trying.

Look, I took mine to CES one year. Compared it side by side with some others. The only ones that were even close, Teres and BDR, aren't made any more and haven't been for years. But you compare enough like that, after a while you can just look at the darn things and have a pretty good idea what you're gonna get. Nothing on the market today gonna come even halfways close to BDR. Maybe a few at the level of mine or Teres.

The Stillpoints looks unlikely to me. But you never know. Shape counts for a lot. Shape can be so important there are profound differences between otherwise seemingly identical things that come from only a slight difference in shape. So I find it unlikely, but who knows.

Only thing I can tell you for sure is that when you try it then you will know. So I would buy one you like from some place like Music Direct where you can 100% return it for any reason. In fact if you are really serious then order two or three you like and keep only the best. Because when I was at CES, as clear as it seemed to me which was best each time, there was always someone in the room with a different take on it. I really don't care about their eval, and neither should you care about mine, or anyone else's. Which is why you just have to try em yourself.