I've bought the Code Factory Vocalizer German voice Anna and could test these voice (HD version) the last days. I must say - for me - it's not better than the old version. In some situations the new engine is worser. Example "löschen" (English "delete") sounds really strange. Also "Tempolimit" ( English "speedlimit" ). The "T" is spoken like a "D" - in German "Dempolimit" - awful . ;)
Will test now the Samsung HD TTS Engine ;)