I recently did some EAX testing with Baldur's Gate II: Shadows of Amn which got me into the mood for replaying it. I like this game much more than its predocessor, as it has a stronger story and more detailed party member interactions. Decided to go for a (somewhat) power gamer run, so my party is as follows:
1) Protagonist - Neutral Good Elf Archer
This kit gets really powerful at higher levels, as the THAC0 and damage bonuses stack up. I gave him grand mastery in short bows, since you can find some pretty good ones early on. Having a mage cast haste on an archer practically gives you a machine gun.
2) Yoshimo/Imoen (Thief/Mage)
Not the most powerful party members out there, but I like keeping these two around for story reasons. Won't spoil anything here, if you know, you know. Still, Imoen is a solid mage and can also serve as a backup thief, while Yoshimo gets those cool special snares due to his kit.
3) Jaheira (Fighter/Druid)
This elven lady becomes a surprisingly good tank once she gets the iron skin spell. Also, her insect plague turns enemy mages into practice dummies. I currently have her specializing in scimitars, since you can get a speedy one which provides an extra attack relatively early. She will be using a shield in her left hand for now, while possibly switching to dual-wielding at a later time.
4) Anomen (Fighter/Cleric)
He's a bit annoying until he passes his knighthood test, but he gets really strong after leveling up a bit. Despite being dual-classed, he remains a decent fighter, and can buff himself up with holy might and similar spells before tough battles. Give him the mace of disruption and he'll be slaying undead enemies left and right. And at very high levels, he can literally make vampires and liches explode with his turn undead ability.
5) Keldorn (Inquisitor)
This old paladin is pretty awesome. His kit provides dispel magic and true seeing several times per day, making him the perfect counter for enemy spell casters. He becomes nearly unstoppable if you get him the holy avenger sword, a girdle of giant strength and dexterity gauntlets.
6) Jan (Illusionist/Thief)
Arguably the best thief in the game. His self-made gear provides bonuses to several thieving abilities, so you can save some points there. I like maxing out his set snares skill, since he can get those powerful spike traps in the expansion. They can shred even boss enemies to bits, if used correctly. He's also a competent mage, though he can't cast necromancy spells due to his kit.
On that note, I'm playing Shadows of Amn without the Throne of Bhaal expansion installed for the moment. This is because the expansion greatly increases the experience cap, which can make you too "over leveled" for the base game encounters, so they become less of a challenge. To avoid that, I'll only install the expansion pack after finishing the main story.
Gotta say, loading times in this game are a lot better when you have an SSD and a fast CPU. I'm playing it on my Core 2 Duo E8600 rig under WinME with an Audigy 2 ZS providing EAX. Note that on Audigy cards, it's best to use VxD drivers when playing this game under Win9x.