My only user experience is with the Vanagon. The luggage rack is handy; we use it to hold occasional items that we know won't be used every stop (bagged screen room, hibachi, and other items that just seem to take up valuable interior space) but we could live without it. Other Vanagon guys have decided the same thing and have done away with the luggage rack and actually extended the pop portion to extend the roof's full length, but this requires a new, longer canvas to be fully appreciated. They use the luggage part; they skin over the depression area to make it a full-height top section and blend it into the main part. A lot of work, but some of us are nuts
and more energetic than the rest. Pic and project roof below from user Howesight on thesamba.com.
I like the look of the Eurovan roof, sleeker and lower profile but harder to find. PleasureWay essentially copied it for their Traverse line but it's a shorty poptop like a Vanagon uses, ending behind the front seats, while the Eurovan is full-roof length. I think your selection will come down to which poptop you can actually find. Vanagons are most plentiful and probably the cheapest but you might luck out and find an EV. Check the Samba EV classifieds. Note: There's a seller in Pahrump NV with a less-than-stellar rep.
https://www.thesamba.com/vw/classifieds/cat.php?id=76
Some Type/T nomenclature: All VW vans are Type 2, the Transporter; the Beetle was Type 1. The various versions of the Transporter are the T vans; the original split was T1, the Bay (or loaf) bus was the T2, the Vanagon was the T3, etc. So, a Vanagon would technicallly be a Type 2 T3. It can be confusing.