Originally Posted by shhbz
request to user if they can advice on which firmware will be good as if i stay stock is right choice to update to latest or should iI go custom and if later the n which rom as need it for an upgrade for my young bro phone
If you are staying stock, go with the latest 4.2.2 firmware as it has improvements in regard of gaming drivers and lags compared to 4.1.2.
There's GENNXT, that's the most stable available stock based ROM.
Advantage of stock would be better gaming experience, samsung apps and dual SIM functionality
While the down side would be the usage of RAM is a little higher, as can be expected by stock based ROMs, so expect freezes and lags every now and then.
If you are going custom, in 4.2.2 there's only CM11 that was just released 3 days ago. If you opt to downgrade to 4.1.2, there's an array of ROMs available like PAC-MAN, MoKee, SlimBean, Resurrection and so on.
Personally I would recommend SlimBean, as it's the one I'm usually on and it's the one with the best battery backup, but all of them are full of customizations.
Advantage of being on these would be great performance, close to no lags at all, and starts with over 500 Mb RAM free
And the main disadvantage would be single SIM functionality and limited graphic drivers from 4.1.2 firmware