if your laptop mobo supports 533 bus, then you can also pin mod your 1.7 to 2.26 [very high success rate with this mod, and have done 2 myself]
the only downside of the "Dothan" chip is it doesn't multitask particularly well and as already stated will struggle in comparison to modern chips when re-encoding.
personally I'd try and get a core duo [Yonah] or core 2 duo [merom], but you would be looking £500 minimum for a Yonah
I'd rate a 1.7 as equivalent to a 3.0/3.2 P4 on overall performance
the only downside of the "Dothan" chip is it doesn't multitask particularly well and as already stated will struggle in comparison to modern chips when re-encoding.
personally I'd try and get a core duo [Yonah] or core 2 duo [merom], but you would be looking £500 minimum for a Yonah
I'd rate a 1.7 as equivalent to a 3.0/3.2 P4 on overall performance