I have a Saito 100 on a 8lb Extra 300. It is great for pattern but not enough to hover comfortably. From the engines you listed the YS110 is the best by along shot. This is what Marcello is running in his Zafiro (fiberglass fuse version of Epsilon). The rest of the engines are WAY overkill (YS120) or too heavy (OS 4 strokes).

The YS110 can yank around those Extremeflight Yak-54's at 8.5lb like its nothing.