Your talking about the BG

ark Alliance games right?
Well, personally I don't like them. They are action RPG's so you are constantly hammering the attack button and blocking. I played one for about 3 hours into the game. It was fun for a while but got VERY tedious. The story up to the point I'd played was nothing to right home about either. They are not great when compared to say BG2:SOA.
If your looking to buy a console for RPG's, I'd go with a PS2 if you don't already have one, as it has many good RPG's if you happen to like Japanese games.
Dragon Quest VIII is one of the best games I have ever played (it's a bit like a Final Fantasy game). Also the Shin Megami Tensei Series are quite good and games like Disgaea and the other Nippon Ichi SRPG's are excellent.
And also the forthcoming Rogue Galaxy looks great!