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Assuming the system is piped properly a 0010 would be a better chioce on the boiler loop. A 008 has a much steeper pump curve than a 007.
I don't use Grundfos and have no specs on that pump.
You need to look at the pump curve for a given pump. Horsepower doesn't tell you anything. Where did you get the 008? If you can get a 008 the same place has access to a 0010.
The DHW circulation loop may be to close to the boiler loop. I just looked and see what you mean. I wonder if it's a typo. I've never seen any Taco 00 pump model with more than 1 hp. I'd go with the 1/8 hp version.