Welcome,
If you want to spend a lot of money there are any number of nice units out there.
Have you ever considered the dark side and convert your Dolphin to an MCCR.
It is very easy, can be done with their reg down to 90 MSW or so. Costs less than 500 USD.
One advantage is you will be familiar with the platform.. Of course I am assuming you dumped their BC a long time ago as well as the Oxygauges.
Dale