The Tangent Wave is the older model to the Tangent Element and I don’t think you will like the wobbly shuttle wheels and loud plastic clicking button sounds of the Tangent Wave. The Tangent Element also suffers with the loud clicking buttons which make it seem cheap and session clients would likely think the same. The Tangent Element is also pretty pricey at $3,295 USD from B&H.
I would suggest looking into the Avid Artist Color Control Surface (formally MC Color) instead. It looks more professional, has softer buttons, better track balls, and is quiet. You can get an Avid Artist Color Control Surface from B&H or eBay for a price range close to what you already want to spend $1,200 to $1,400 USD. You could also later expand the Artist Color by adding the Artist Transport control.