Lack of first-hand knowledge has never stopped me from posting before, so why start now...
I say if you're convinced 35's is as big as you ever want to go then 4:56 is the way to go. If you think you may want to go bigger some day then do 4:88's. If you had the 5 speed then I'd say go for 4:88's no matter what.
Do you have lockers? When you regear you essentially get the locker install for free, so it's a good idea to do it all at once! hth..
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 01 XT225, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50