Where do you guys get em from? Direct or a supplier? Im after a set for a street/sometime strip Hemi

I assume its better to run the ones with the bigger roller as below? Would this below be suitable ?

http://johncalliesinc.com/product.php?ProductNo=6073

Some don't like hyd rollers due to the Hemis valvetrain weight but if I use the right lifter/spring up to 6500 MAX it should be OK yes/no?

Cam will likely be @ 240-250 dur @ .050 max with around mid .550 - .570" of lift.

Thoughts ?