How long should a water pump & valley pan gaskets last?

[Budget M3]

I blew the upper radiator hose today (to my shock, according to fully documented dealer records from the previous owner, it was still the original hose at 183,500 miles!!! )

My first thought was to replace EVERYTHING as preventive mx--radiator (also probably on borrowed time since it's original), all hoses, thermostat, water pump, valley pan gaskets, etc. However, checking the records, I found that the X has had the following parts replaced "recently":

new coolant expansion tank at 159k in 2009,
new water pump/lower radiator hose at 109k in 2005
new valley pan gaskets in 2005 at 115k, also in 2005

I figure the expansion tank is good to go, but am torn on replacement of the water pump and valley pan--wiith "only" ~70k on those parts, should I worry about them failing in the next 2 years/30k miles?

as of right now, I plan to replace:
radiator
thermostat
all hoses--upper, lower, expansion tank, etc

What would you do? Would you replace the water pump and valley pan gaskets, too, while everything is apart?