Heating Help

Combi Co Oil vs. Oil Water Heater w/flat plate HX

I'm thinking of replacing a Brad White Oil fired Combi Cor with a Brad White Oil fired water heater with external flat plate heat exchanger for the heating side. I know that they've improved the Brad White combi cor but I'm not trusting that they've been operational in the field yet.
Plus if the water heater fails down the road it will be less expensive to replace...
Does this make sense?

water heaters

Combi's are bad news, at lest the oil fired ones. Oil fired Bradford white heaters are just Aero heaters (old skool cf32s) very good quality, used  to be build in Mississauga, ON. I've had very good luck with these heaters run;n into 18 year old heater s on a regular basis.If yoou roll with a hwh with a exchanger, run your cold water in with the drain fitting (srew in brass tee).Cap off the top connected cold water. This will help to prevent sediment build up. The extremly high temps and hard water are what kill these heaters...... Plus if the heater burns out in ten years or so you can just buy a replacement tank and save the burner and piping.