Looks reasonable for a minimum install. I'd want to have twice as many drops with multiple CAT5 and RG9 cables to many drops but everybody has to make their own decision about "enough". I'm sure there are wireless fanatics out there that say the whole thing is a waste.
As was mentioned, install CAT5E rather than phone wiring. You can run a phone over CAT5 but you can't run data over a phone wire. I personally don't have any hardwired phones in the house because VoIP has replaced the wire from the teleco and cordless phones work great in any normal sized house. They might want to up-charge you a little because CAT5E costs more but it shouldn't be much. CAT5E runs about 8 cents a foot while phone cable is about 3 cents a foot on monoprice.com
28" is OK for the cabinet but try to get one that can have a 2" depth extension added. That makes it much easier to fit gear in it and provides additional ventilation if the cabinet is flush mounted. Mine is a Leviton and and the depth extension is just a frame that bolts on to it. A standard two plug outlet installs in the bottom to power your network gear.
Have them install a pull string in the chase pipe.
We never even talked about electrical. It's a lot easier to install lighting automation switches at a later date if you have neutral wire in every switch gang box and your switch gang boxes are extra deep. The first part is generally the case in new construction but it can't hurt to double-check. They might make a fuss about the gang boxes but they should be able to get them from their electrical supplier.
There are so many other things we have not talked about like whole house UPS/surge suppressors, prewiring for keyless locks, power-line Ethernet compatible GFCI breakers, 2GHZ coax main splitter, WiFi access points, Zigbee vs Z-Wave vs UPB lighting controls, home automation controllers, and the list goes on and on. But that's all the stuff that will make your future interesting!
As was mentioned, install CAT5E rather than phone wiring. You can run a phone over CAT5 but you can't run data over a phone wire. I personally don't have any hardwired phones in the house because VoIP has replaced the wire from the teleco and cordless phones work great in any normal sized house. They might want to up-charge you a little because CAT5E costs more but it shouldn't be much. CAT5E runs about 8 cents a foot while phone cable is about 3 cents a foot on monoprice.com
28" is OK for the cabinet but try to get one that can have a 2" depth extension added. That makes it much easier to fit gear in it and provides additional ventilation if the cabinet is flush mounted. Mine is a Leviton and and the depth extension is just a frame that bolts on to it. A standard two plug outlet installs in the bottom to power your network gear.
Have them install a pull string in the chase pipe.
We never even talked about electrical. It's a lot easier to install lighting automation switches at a later date if you have neutral wire in every switch gang box and your switch gang boxes are extra deep. The first part is generally the case in new construction but it can't hurt to double-check. They might make a fuss about the gang boxes but they should be able to get them from their electrical supplier.
There are so many other things we have not talked about like whole house UPS/surge suppressors, prewiring for keyless locks, power-line Ethernet compatible GFCI breakers, 2GHZ coax main splitter, WiFi access points, Zigbee vs Z-Wave vs UPB lighting controls, home automation controllers, and the list goes on and on. But that's all the stuff that will make your future interesting!