re: RTi toe in ... i think that they are toed in a bit much BUT, i think it's for the better because of its proximity with the side walls. unless you can do treatments for the side walls, I'd probably leave it as is. (but you should try both toed in and straight out)
if the tweeters are at your ear level, they're not too high.
re: dual pluses, I think you should try the dual fronts as well as an experiment, dual fronts will let you feel the wave of bass coming from the front and symmetrical placement. one plus near the couch will give you the couch shaking feel ... it's all up to you