There are no really good rogue macro's because of how energy and combo points work. Combat is most easy to model , but you suffer on the dps front when switching targets. The way I've done it is using a /click macro to click 2 buttons:

Opener: /castsequence reset=combat sinister strike, sinister strike, slice and dice, null
OR: /castsequence reset=combat,target sinister strike, sinister strike, slice and dice, null

This will start up slice and dice after you enter combat. Keep in mind that SnD is not a target-specific buff, so it carries over from target to target. The problem is, that if you reset the macro on both combat and target, your dps will hurt from reapplying SnD instead of eviscerating, and if you don't, you risk getting 1- and 2-point eviscerates, not having combo points to execute SnD etc. Overall the non-target macro seems to give me higher DPS, but it's a matter of preference I guess.

The next macro:

DPS: /castsequence reset=combat sinister strike, sinister strike, sinister strike, sinister strike, sinister strike, eviscerate, sinister strike, sinister strike, sinister strike, slice and dice

Which is a 5-point eviscerate followed by a 3-point SnD. On a target dummy this will enable 5-point eviscerates without SnD ever falling off - however the problem, as mentioned above, is target switching. You can reset this macro on target also. Try both and see which works better.