Which Performance Counters about System are more important?

[ericnet]

In short I will launch a marketplace, an ASP.NET VB.NET web application that will run in my own Windows 2000 server. So that start doing things correct I am building a Windows Service to store performance counters values into the database about Server System (Processor, Memory, Network and Disk I/O). I will use this Windows Service when my Web Server is in production. I think this is called ‘Monitor Web Server’.

I read an article which for the moment is my guideline to decide which counters I will use. And referring to System Resources, these are which I have chosen:

Processor:
Processor\% Processor Time
System\Processor Queue Length

Memory:
Memory\Available Mbytes
Memory\Pages/sec

Disk I/O:
PhysicalDisk\Avg. Disk Queue Length
PhysicalDisk\Avg. Disk sec/Transfer

Network I/O:
Network Interface\Bytes Total/sec
Network Interface\Bytes Received/sec
Network Interface\Bytes Sent/sec
Server\Bytes Total/sec

What do you think about my selection? With these performance counters I will be able to detect the main bottlenecks my web server can suffer? (In System Resources. After that I will choose ASP.NET performance counters and finally ADO.NET/Data Access performance counters)

Thank you