Setting up brokerage account and backdoor roth IRA- which funds?

Im 35 years old. I have a 401k with $400k in it, with a target date fund set a long time ago. Fidelity freedom blend 2045. Expense ratio is .25 it has been doing very well the last few years I want ETF’s- some combo of the VT, VOO, VXUS, VTI ones i keep reading about. This will be money i dont touch for at least 10+ years. So i will be putting $100k to start in a brokerage account plus $7000 in the roth ira via backdoor conversion. Which funds should i select where? I believe i read some of these make more sense in brokerage account vs roth given their tax implications. Also which funds make since given my 401k funds/exposure? Thank you