4.8is coolant leak take 2

[FourPointEight-is]

After spending a while replacing the radiator and various gaskets I find myself with yet another coolant leak. I guess now that I fixed the weakest point the next weakest points let go.

It doesn't seem to leak when the car is parked on an incline (nose UP) but does so when the car is on flat ground or parked on an incline (nose DOWN).

It's coming out of the hole in the front of the engine. That's the coolant valley pipe right?

There appear to be 2 ways to fix it.

1: BimmerFix Coolant Pipe Repair. This one is about $250 and looks like it allows you to fix it "in-situ" without removing the intake manifolds etc (looks to be considerably less work).

2: MTC Replacement "Collapsible Coolant Pipe"
https://www.amazon.com/11-14-1-439-9.../dp/B00DFANZNG
This its cheaper at $130 but requires substantially more disassembly of the engine plus I'm sure there will be a lot of gaskets etc that need doing if I take it apart so lots of screwing around ordering extra parts and waiting for them.

Leaning strongly towards option 1 - it looks like it'd save a lot of time.

What other stuff (if any) should I replace when I'm in there? Any gaskets etc?