1000 Point IG, escalation league

I'm playing in an escalation league, where we're limited on points and available units based on a $$ limit. I'm building a list from the following available units that I've aquired:

Command Squad

Commisar

Vet Squad
Vet Squad

Chimera
Chimera

Stromtrooper squad

Leman Russ (Demolisher kit)

Armored Sentinel

We're at the 1000 point stage, and this is my list in progress (no point totals, I'm doing this w/o my Codex in hand and off of the top of my head)

Command Squad
Cdr w PP and PW
Vox Caster
Regt Standard
2x Body Guard
2xvet w/Plasma
Chimera,w/ Flamer

Lord Commisar(attached to Plasma Vets)
w/PF

Vet Squad
Sgt w/PW
3xPlasma gun
Vox
Chimera, w/Flamer

Vet Squad
Sgt Harker
Vox
2xMelta
Flamer


Storm Trooper Sq (5)
2xMelta

Lehman Russ Executioner
HB on hull
Plasma Sponsons

Sentinel
Autocannon
Smoke Launchers

If memory serves, this puts me right around 1000.

I'm playing against SMs, Tau, Orcs, and Demons. Figure the plasma and meltas help with SM's and Demons, but I worry about not having enough anti-horde. At this point, my only options are to adjust the Russ and Special Weapon allocation in the Vets and CCS, and I had considered squeezing in Straken and making the CCS more of a Close Combat squad.

Thoughts; this will be the 2nd game ever with IG, so I'm feeling out the Codex options.