Wow! Thank you guys! For the huge amount of comments (much appreciated) and the support. The overwhelming majority of you seem to like this colour scheme, so I persevered and did another one today. Meet the sergeant (don't worry, when the squad is fully finished, I'll do a full fluffy post of them all. 

Of course, seeing as the previous terminator had the wrong left arm, I painted the correct one, and added that. So here's the final pose:

Now, these are not quite finished yet - I aim to weather them with sponging and chipping - but I'll do that in one go when they're all finished to get the look as unified as possible.
Anyway, I hope you like this guy too and would love to hear any and all feedback you have for him.
Is there anything missing, perhaps?
Cheers!
Replies:
@ The Observer: Haha, thanks, buddy!
@ rednekkboss: Oh YES! I'm very happy to hear this, and am very much looking forward to what you do on them. Incidentally, do you have a tutorial somewhere wherein you explian how you do the greenstuff Nurglite pustules and gribblies with which you adorn your models?
@ Viarocanum: Thanks! I wasn't sure if I'd do them in metal or colour, but as Krauty pointed out, above, they aren't 30K anymore, so I love them to have a bit more contrast.
@ Sagentus: Cheers for that vote of confidence, mate. That nice of you to say.
@ The Traitor: Yu know what, that colour scheme is the exact one I was contemplating! I guess I chose gold over silver because I wanted the First Company to have a more regal feel to them.
@ MrBear: Exactly that, indeed. First Company brothers need a bit of bling, no?
@ Knight of the Raven: Ha! I couldn't agree more with your first statement, there! Also, I'm glad you like 'your' marine's fluff, but am a bit surprised it took you so long to read it!
@ Psykic_scribe: Cheers! Me too - unfrotunately they are a bit expensive and I'm strapped for cash atm...
@ SkimaskMohawk: Tanks for the feedback! Glad you like teh cataphractii, but sad you don't the chaplain.
I agree there's a lot fo beige, but that's mostly his cape. ANd for consistency's sake, his outer robes had to be beige...
@ Lord Commander Eidolon: I now you did, and it paid off for you too! It's funny nhow everyone is suggesting to use a purple wash to add to the gold trim. I'm going to try it now. SClae 75 paints are indeed fantastic - a friend picked up their 'fire' set and those reds are absolutely gorgeous.
@ KrautScientist: He didn't have a name and your suggestion was perfect - so it's totally yours. If you have any fluffy suggestions (perhaps integrating him into your Eternal Hunt - my army is 32K themed, as you hopefully know, so he might have shad some altercations with Lorimar). Concerning the colour of the was on the purity seals: all my army's prity seal wax is purple, and I'm a bit of a stickler for consistency, so.... yeah.
'Come to daddy' is indeed the sentiment I was shooting for. 
@ Mechanist: Cheers! His sergeant's finished, now only two more dudes. 