TwinMOS IS a company

one line of their PC3200 ram uses regular winbond BH-5 chips which is the highest quality available

Corsair has a line that uses handpicked winbond BH-5 chips but the price is very very expensive

http://www.twinmos.com

therefore, twinmos ram is the choice to buy if you can find that winbond bh-5 line which isnt hard
and its cheap!