Need help with Mobile Pentium III chips... HP Pavilion N3390

[shapiror06]

Hello,
I have a HP Pavilion N3390. It has an Intel Mobile Pentium III 600MHz (SL443). The specs are as follows:

Frequency: 600MHz
FSB: 100MHz
0.18 Micron
256KB L2 Cache
Socket: Micro-PGA2
Stepping: PB0

I got all of the info from here: http://processorfinder.intel.com/list.aspx?ProcFam=55

Here's my question. From the list on the webpage above, based on the processor specs from the CPU already in my system, what is the best processor that is compatible with my system board? The thing I'm hung up on is the Stepping. Does that have to be the same? If so, the fastest processor that will work is the SL44T (750MHz). I could be wrong though, could you clarify this for me?