The upgrades are definately not worht the cost. Even with Carapace Armor, the T3 vets die easily outside of their transport & without cover. Take the Chimeras, leave the carapace armor at home. If I was playing my mech guard at 1000 points, I'd rather play this list!
HQ -
CCS, Plasma x4, Chimera (165)
Troops - Vets, Plasma x3, Chimera (170)
Troops - Vets, Plasma x3, Chimera (170)
Troops - Vets, Plasma x3 (115)
Troops - Vets, Melta x3 (100)
Fast Attack - Vendetta Gunship, Heavy Bolters (140)
Fast Attack - Vendetta Gunship, Heavy Bolters (140)
The Vendettas are stupidly good right now, can transport vets just fine, and add the the AV12 saturation. I think that they accompany chimera heavy lists perfectly. To be fair, they are a welcome addition to basically any list imaginable... This list has MORE firepower, MORE survivability, and requires serious anti-flyer capabilities to counter. It will cream lots of 1000 point lists that don't have an insane amount of heavy firepower, since basically all anti-infantry weapons are useless until they've gotten some of those troops out of the transports.
Automatically Appended Next Post: It would cream another
IG mech list that was just 5 Chimeras, such as the one you listed above, EASILY.