I have not tried Cubesmith tiles yet, but the textured ones give you more grip but makes your fingers sweat more and smooth tiles have some texture. It's a matter of personal preference.The Cubesmith tiles, are the textured ones better than the smooth ones?
Type A Third Model has tabs that should prevent popping, but that makes it pop more. It isn't a good cube (some people have made hybrids with the pieces with great results)what does "Third model" mean?
I'd buy from 9spuzzles/Rubikfans on eBay. Both stores have the old Type Ds with the fat screws. White/any other color cubes are smoother than black cubes, but get black if you think other colors would mess up your recognition.Basically, if you were to buy white D and A cubes right now, where would you buy them? and what ones?