I recently got a Bambino Plus, and while the portafilter was adequate, I realized my shots were extracting too quickly when I switched to a bottomless.
This is the one I ended up getting. It has a longer handle, which is nice for the leverage.
The tamp is honestly the worst thing out of the base set, so I would replace that first. I bought the Normcore branded tamp, puck screen, and WDT tool. Also highly recommend a dosing funnel to keep the mess minimal.