I like the 2nd last row, and the last row (58 or 59 A/C/H/K) These are the 2 seat pairs (window and aisle) with much more room beside them. The main Y galley is right behind 59, separated by a curtain, so there might be a noise issue although it's never been a problem for me. 59 has a plus of no one behind you to worry about when reclining.
There are NO exit rows on this plane, the bulkheads are 31 and 48. The latter is not recommended because it's reight behing a huge complex of something like 6 or 8 lavatories.
I've also been told that the first row where the tapering of the rear begins is also not desirable due to the seat being angled away from the PTV screen in front, but I am not sure, perhaps they have armrest screens instead?
The seat map is at:
http://www.singaporeair.com/images/e...B777-200ER.gif
Hope this helps.