I am looking at cleaning up all my added non-factory accesory wiring(2 electric fans, aftermarket stereo, electric Fuel Pump, MSD Ignition and a few aftermarket guages) Anyway I am looking at the painless wiring fuseblocks and can't decide between the 7 circuit all ignition hot fuse block and the one split 3 constant battery hot and 4 ignition hot. What accesories need a constant hot beside the radio, and possibly down the road an aftermarket alarm? I use the factory harness for all the factory things.

http://www.summitracing.com/parts/PRF-70207/

or

http://www.summitracing.com/parts/PRF-70117/



Also is there any harm in going with a heavier duty (higher rated relay fuseblock) than required? all my high draw accesories have thier own relays.

anyone.... anyone.... Bueller?

That's a bunch of questions. I'll throw in what I caught out of all that.

A split box will leave you with options to go either way. Like if you have an automatic fan. This can stay running when you shutdown a hot engine.
The heavier kit will not be helpful if you are not using it for the high amp accessories which have their own feed through a relay. If the fusebox is only for the switching circuit, 10 amps is plenty.
MSD boxes are usually wired to a constant hot, then switched through the ignition.