Nice looking tank and stand. That will look great once it's stocked and the stand is finished.
I used Whisper HOB's in the 90's, when they were labeled Junior through 5, and they did a good job of mechanical and chemical filtration. I don't have experience with the new generation of Whisper HOB's since I am using canisters exclusively now. Should work fine until you upgrade.
Funny thing is, the waterfall sound was the reason I changed to canisters. I loved the sound at first, but eventually it became irritating.