epiphone SG std 2007 - hardware upgrade advice ?

[YahliP]

hi,

i have bought epiphone SG std 2007 ,

do u have any recommendation for hardware upgrades 

1. which tune-o-matic bridge will be direct fit  ? ( i always prefer gotoh) 
2. which grover locking tuners will be direct fit ?
3. do u find any reason to upgrade also the tailpiece?

 

Thanks so much,

Y.