Since this is your first one, I would go for reliability over features, if you enjoy the 1911, which you will, your collection will grow to more feature/style rich versions.
As mirrored, go for a Springfield that fits in your budget. If you cant find one in your budget, go for Rock Island. Some Rock Islands have improved parts over GI style, but you may eventually upgrade some parts for repair or to your taste. I think the Remington R1 still has a rebate going in the standard R1 GI style.
Im not a fan of Series 80, so i stay away from those. I also prefer enhanced over GI style. I have an SR1911 Lightweight Commander that ive had issues with, but once worked out its my favorite. My RIA has had the ejector snapped once, but it shoots wonderfully. My SW im waiting on repair back for the 3rd time