what level should your party members be?

Hi,
i was just wondering what levels your party members should be when you arrive at Baldur's gate city Baldur's gate city in the enhanced edition.This is my party lineup:

CHARNAME: Stalker level 5
Dorn: Blackgaurd level 5
Viconia: Cleric level 5
Rasaad: Monk Level 5
Neera: Wild Mage level 5
Imoen: thief level 4/ Mage level 4 (i am thinking of dropping her for Alora because i don't have a good thief and i hear Alora is a better thief in the EE than in BG1)

i am only wondering because most people say that you are likely to reach the exp cap in BG:EE but the xp cap is 161k XP IIRC and my party members only have about 25K XP each so i cant see them getting anywhere near there

and also, does anyone else a bug where alt+tabbing into Baldur's Gate:EE from the desktop causes a BSOD.

P.S. sorry for the noob question i don't have much experience with BG1