I'll move to strike the FFs - you beat TA and III, give some new games a chance. I also just don't think FFIV holds up all that well anymore and you could get a more meaningful experience from some of the newer games.

Speaking of which, I'll recommend either Xenogears or DQVIII. I think going from V to VIII would be awesome and you could decide for yourself which you think is the better game. Only downside is you might get burned out on the series. Best to come back to DQ as an old friend.

I know you're a Xenosaga fan - don't you wanna see where it all began? Warning - nearly everything about the "game" aspect of it is terrible, whereas everything else is some of the best around.