What glass thickness is best and what are the price differences ?

 I can do 6 mm 8mm or 10mm finish. The 10mmm costs around £110 for me to buy, The thinner the glass the cheaper the price. £90 for 8mm and £70 for 6mm. I can also supply smoked glass, this is around £20 more than clear. All my glass is toughened safety glass with round smooth edges.  The large tables look better with 8mm or 10mm .  The smaller tables sre finished in 6 or 8mm.The thicker glass is of course heavier.