I have all the models except the Unseen ones (PXH, WVR, WHM, MAD) so it won't be hard to fill the gaps. I may wait for the new box sets, then pick up a couple fan sculpts for the WHM and MAD that I really like. In the end, I am pretty happy with it because I get to field most of my favorite Inner Sphere mechs, and they all have designs in later tech eras that can be used which is nice. Might save the Vindicator and my spare Cataphract model for a Liao-based lance later!
I was actually going to comment on something with your make up that touches on this.
I know its a Merc unit but most of them have a history, where as, your mech selection seems to come down to "pick the best variant/chassis for the size".
Which I feel is fine for a pick up game but doesn't really fit the fluff unless your fluff is, we are 12 random guys from all across the IS.
Assuming you have access to the basic boxed set minis, here are some suggestions I have for alternates that is more single faction feel.
Striker Lance alternatives for less minis to buy & more generic feel.
Jenner-7D, its the base model, the F is supposed to be a rare prototype
Spider-5V, Jump Jets & more speed is never bad
Assassin-21, More Jumpjets, some token LRMs, and also in basic set
Vulcan-2T, Snipe with the AC & the LRMs on the Assassin as the lance moves in for back stabs, also the Flamer/MG are great for infantry
HQ (Fire) Lance Options (Keeping the CO out of melee w/ plenty of LRMs)
- HGN-733
- ON1-K
- CN9-A
-Whitworth-1
-Dervish-6M
-Awesome-8Q
-Trebuchet-5N
Battle Lance Alternatives
GrassHopper-5H
Hunchback-Any
Orion-1V/1VA
Whitworth-1S
These options allow you to keep some of the more faction mech choices for if you want specific house lances.
Commando, Panther, Hermes-II, Vindicator, Enforcer, Zeus, etc etc are all very faction limited and make great choices for a faction heavy unit.