Ah, sorry to see the Cannondale you were looking at in your other post is out-of-budget.

For your stated use, you'll want to look at the weight rating of the bike; they're not all designed to carry a 325 lb. rider. eBikes are a great way to get back into shape though.

As for something for your use under $3k that still has the nice belt drive, there is the Priority Current, but it'll be a bit more leaned forward than you're looking for:
https://www.prioritybicycles.com/pro...zdUKgDt9mgo88F

There's also the Ride1UP Prodigy V2, which is $2600 with the belt drive & CVT:
https://ride1up.com/product/prodigy-v2/

The Lectric One is also a good in in your budget. It has the belt drive and also a Pinion automotive-style gearbox, which are more rugged and will have a wider gear range than the internal gearhubs. Another nice thing about this one is that, since it has 20" wheels and a folding handlebar, it can fit in an SUV a lot easier than either of the aforementioned models.
https://lectricebikes.com/products/l...kxy2d9_5GpDjGP

Since you're buying new, you should find an eBike that has the right posture to begin with, not buy something then retrofit it. The bike's stability will be messed up if you get a forward leaning bike then put a pull-back bar on it.