I've noticed from the forum that the Grundfos's model has been changed to CM-CME series. (maintenance free model)
Anyone can advise me what is the (a) new model's name of (that is in the series of CM & CME) [CME is equivalent to "UNI E" series right?) (b) price?

    [ OLD ]    = [ CM ] = [ UNI-E ]
1. CH2-40PC = X            = X
2. CH2-50PC = CM3-5PC = UNI-E CM3-5
3. CH4-40PC = CM5-3PC = X

CH2-40PC = 0.5HP; CH2-50PC = 0.75HP; CH4-40PC = ?? HP

Since the water pump will be installed on the top roof of the bedroom, it's advised to get the "E" series as it's quieter?

I've seen a house installed with (not sure what's the brand) the 0.5 HP water pump and it's very strong even with 2 showers on. Supposingly, 0.5 HP water pump is sufficient I think.

[edited: found out about some of the new name in the new series]