i got my 2nd laptop about a year ago, toshiba satelltie, w/ 2 ghz celeron, 512mb ram and 40 gb HD, and
the thing runs like a champ out in the field, never had any problems with performance and even run
the processor at half speed to save juice, whether you go celeron or p4, there is hardly any performance
issues for application out in the field. now if you were gonna use it for high performace video games, CAD drawing or high processor speed applications, its lower bus speed might affect it, but for taping, you'll need less than half of that 2.6ghz processor, whether its celeron or pentium class, hope this helps. oh and to add, as long as you have a bunch of ram, it will pick up some of the slack of the processor
-chris