agilent digital microwave
If you expect good technical support and communication between equipment and software (ADS/mathlab) for the equipment purchased, I advise you to consider Agilent. However the price is expensive.
Question:
1. What is your requirement for the 6 items?
2. Low noise floor also depends on application, if you are dealing with very weak signal (such as satellite communication), you will need that option.
3. You can own power meter and microwave counter in 1 unit solution, such as agilent 53147.