The DMT D8C 325 continuous plate is well thought of and can be found here for about the best price I know of. The Shapton GDLP is the more expensive option. It is perfectly flat where the DMT may not be as flat but you can buy a half dozen DMTs for the price of one GDLP. The DMT is plenty close enough for a lot less $$. I have both BTW..... say that to say that what I am saying isn't speculation. Just IMHO.