I would add P965 based boards to list as well (based on price/perf, since P45/P35 are usually premium).
I managed 520MHz on 65nm quad core on my X48 board 😉
Nvidia nForce Intel chipset have one HUGE advantage over Intel stuff : FSB/DRAM can go beyond 1:1 mark (ie. DRAM real clock can be lower than real FSB clock).
Can help if you have crappy DDR2 memory that isn't capable of high speeds.
Otherwise, Intel chipset will clock CPUs higher/easier. On top of that, in nForce you get Hyper Transport to worry about (the between bridges communication lane, it's linked to FSB speed).
That Striker is the OG one (680i, ie. this : LINK) ?