There's one thing I can say about, the typeface quality. Almost ALL ASCII fonts which are used in these day's publications are converting to Unicode while pseudo-unicode developers are fighting a font war. You can see here http://www.mymyanmar.net/2g/feats.php?f=universal. Even ZawGyi's typeface designer, U Zaw Win Myat generously gave me the rights to convert ZawGyi typeface to Unicode. And I can say a few number of BIG publishers are using Unicode 5.1 now. There is nothing you need to worry about typeface. And I cannot see a COMMERCIAL unicode 5.1 font yet.
 I suspect I cannot get people to believe unicode is the right solution if there aren't people who are saying pseudo-unicode fonts are better.

Htoo