IMO, a bottomless filter is a MUST if you have not trained on one before.
With regards to taste, the only way it will affect taste if its not heated. With a naked PF, your shot drops straight into your cup.
Unless you know u dont ever need to make two coffees at once with a double spout, dont cut it. and plus, a VBM stock PF is quality and u dont want to just go hacking away at it.
If im making only one coffee, its always a bottomless.
hope it helps