Do I need to upgrade to an acoustic piano?

I started on an acoustic grand upright that was crafted like 60+ years ago. The workmanship was incredible. The sound board was like WOW. So, when I started to get digital pianos because I am forever traveling, I've had General Music, Roland, Yamaha and Kawaii over the years. The Roland was a big keyboard with a nice sound and feel. That was followed by a General Music Pro I which had a better feel and was easier to transport. This was followed by an Roland F9 (I think) and a lighter Kawaii ES100. Kawaii has made significant improvement and is what I now use for my main pianos (ES8 and ES920).

There are several digital pianos that have full wooden keys. I am looking at the Nord USA Key Grand 88-note Keyboard which has the Kawai Hammer Action with Ivory Touch versus the Kawaii VPC1 which has the latest action and is a controller. My Yamaha Motif 8 did not have a good keyboard action and the piano sounds were weak. 

The biggest thing with an acoustic is getting a good one AND having the space for it. You will be spending some coinage for a good one. You will need regular tuning and need to make sure it is not on an outfacing wall.