I was asking if the bluetooth device will appear as a COM Port like when it's connected by a USB cable.
I wonder if you are a bit confused.
The bluetooth module inside your PC is what appears to the PC as the COM port. And, yes, as far as a program on the PC is concerned it should be identical to a COM port over a USB cable.
The Arduino knows nothing about COM ports - it just sees a serial connection and it has no idea whether there is a PC or another Arduno at the other end.
I have not heard anyone complain about the quality of Arduino bluetooth modules. The HCO5 is commonly used but the HC06 is sufficient and is a little cheaper. However you should be aware that any Bluetooth link needs a master and a slave and the HCO6 can only act as a slave whereas the HCO5 can be either master or slave. For communication with a PC the PC will be the master.