>>64137374
Fudd arms s7 is best value (usually has kits on sale for around $100), GMR s7 is good too. Bit more expensive but I like their finish slightly more.
Some enterprising anons are working on "new & improved" atrius style selectors (atrius themselves have been having some issues lately), not sure when they'll drop or what availability will be like. Those will probably be around $200-250