I had intended to hard-plumb my returns, but I am finding that BRS does not carry schedule 80 bulkheads that slip-fit on the outside of the tank, only threaded. Given space constraints I would need a street 90 right out of the bulkhead. They do have thread x barb 90s that should meet my space constraints, but that would require plumping at least part of the return with flexible tubing.

What are the tradeoffs and what direction do people think I should jump?