I think the XDeep ZEN is probably one of the nicest BP&W setups out there, but it's set up differently than most other brands do it, so if you're mixing it with a different brand backplate or wing you might run into issues.
I personally went with the Apeks WTX-D40 PSD, but that's due to the weird way the Apeks wings were priced at my LDS. There was a huge price gap between the WTX-D30 and the WTX-D40, but the WTX-D40, WTX-D30 PSD, and WTX-D40 PSD were all priced similarly, with maybe €20 difference between them. The WTX-D18 is very expensive as well for some reason.
WTX-D30: €240
WTX-D18 €380
WTX-D40 €420
WTX-D30 PSD €430
WTX-D40 PSD €450
I wanted a wing with the PSD coating, and for the extra €20 I figured I'd just go with the D40.
At the moment I only have two set ups, and that's a sidemount harness and a stainless steel BP&W with a WTX-D40 PSD wing and an STA.
It's not ideal for travel. It's heavy and it's big. In the future I might add a travel setup, but for now I'll just deal with it.