I can't tell about brands but basically you should get a decent quality neck even for $50. One with a "paddle" headstock you then carve to whichever shape you like would add to the "made by yourself" theme. The fret ends will most likely be rough and the frets may not be leveled, even some loose frets may appear. As long as the scale is right (which seems to have improved) any straight neck should do. The "flaws" can be considered as part of the building and learning how to deal with them is part of the fun! When experimenting with an inexpensive and replaceable neck a total catastrophe won't ruin the build. Truth to be said, the "above average" necks have started their life as average. The love and affection of a builder is what raises them. And the tricks are pretty simple: Check that the frets are properly seated, level them, file the fret ends flush with the fretboard, round the ends of the frets, adjust the truss rod, adjust the nut, adjust the bridge. There's videos about making a $100 guitar play like a $500 guitar and that's what they do.
There's companies that make kits more or less finished according to the wishes of the buyer. Crimson Guitars in England are one of those, you can get anything from a rough CNC'd piece to a polished and finished item you'll just have to attach.
Gotoh make good quality hardware for a decent price. There's also cost effective pickups available. I've been toying with the cheapest Chinese parts and to be honest that's a lottery as the parts can be picked from the reject bin. Paying $20 instead of a tenner for bulk Korean tuners is worth the price, the benefits of a $500 bridge can be questionable compared to a sub $100 one.