Do you want best bang for your buck? Or are you willing to invest some money, time, etc?
For 'best Sub for the money'... The $100 Noobmariner. No doubt.
Otherwise, you have to build it. Personally, my favorite recipe is...
TW Best case
TW Best crystal (with invisible crown etch @ 6:00; visible with a loupe)
Noobmariner dial
Noobmariner bracelet
Genuine insert
Genuine crown and tube
ETA 2836 (gold or nickle... Doesn't make much difference since the caseback is solid, and neither looks like the gen 3135 anyways)
Noobmariner datewheel overlay
Shape the CG's a slight amount, shave the insert down, assemble the parts listed above and the result:
2.5x Date mag
Deep rehaut
Hollow linked, short SEL bracelet
Genuine inserts/pearls
However, at the end of the day... There is simply no denying that a rep is just a rep. If you are seeking absolute perfection, save your money and buy the real deal.
Cheers,
R