Donlis is essentially equivelent to GFS. Tonerider and BYO are a step up, with BYO being particularly "boutique" with even lower prices than Tonerider. BYO is the one to beat. When it comes to how they'll sound, as long as the pickup in question doesn't have a brass cover, it's all the same, with the difference being how you feel about the particular electrical values spec'd for a given pickup. A lot of guitarists will say a pickup is high or low quality based on what they hear, when in truth it's wholly a reflection of their personal preferences.