An out of balance rifle is a risk of using a #6 contour, and one of the reasons that sights won't be purchased or installed initially. If it's too front heavy I can either recontour a bit, add some lead in the stock, or a bit of both. Once I have it how I want it, the sights and finishing will be done.
As far as the choice of sights, the NECG sights are the ones I'm aware of that are readily available. They look good and are highly functional, but I certainly would consider other options if I stumble upon any. For some reason, I'm a sucker for barrel band front sights, which complicates matters slightly when it comes to scrounging since the band diameter needs to be close enough to ream to fit. As a lefty, I've also found that attempting to scrounge parts, particularly actions and stocks, is a road to frustration, so it generally doesn't enter into my mind. I'm also far too picky about most things. I typically decide what I want and save money by waiting for a sale.
I actually was planning on a barrel band sling swivel to match the front sight, for both functional and aesthetic reasons. Having been bashed in the hand by a fore end mounted sling swivel, I can assure you it's less than pleasant. My current .375's both have barrel bands and I prefer it. It will also help the rifle stay where it belongs when slung with the suppressor mounted.
I realize it's somewhat odd to build a low budget, push feed, stainless and synthetic cerakoted rifle, throw a suppressor on it, and then insist on traditional express sights and a barrel band swivel, but we're all a little odd sometimes, myself more than most. Maybe I'll really blow your mind and install a quarter rib; I'm a sucker for them too, but it would potentially complicate scope mounting. Engraving a buffalo on the aluminum floorplate may really compliment the knurled tactical bolt handle!
In all honesty, the budget for this build is entirely imaginary. I just wanted to see how cheaply I could throw a nice, albeit somewhat ugly, custom rifle together. The only reason it's a .375 is that I haven't built one yet; I already have custom builds in smaller calibers. Once I decided on .375 I knew I'd blow the budget on sights. It was almost a .416 or a .458 since I have neither, but I choked on the idea of building a push-feed .4-something. If I do end up getting my hands on a lefty M70 CRF action the chambering will start with .4, and probably end with 16. That one will be at least a little more traditional, along with a lot more expensive.
While I'm afflicted with left-handedness, I'm fortunate enough to also be left eye dominant. I have a nephew who is left-handed and right eye dominant. He's learning to shoot right-handed as well. Fortunately, we caught that early and started teaching him right-handed, so there's nothing to unlearn for him. His father (my brother) has the worst of all worlds in this regard; he's right-handed, left eye dominant, and learned to shoot right-handed. His choices are to close his left eye, don't hit anything, or learn to shoot left-handed and have the same problems finding suitable guns that I do. So far he's chosen to close his left eye when shooting rifles, and not hit anything when shooting shotguns.
