Go look at 1911 sights at Brownells.
For the most part,the Novak,etc sights are more money and require slide machining in many cases. I am partial to the rugged reliability of fixed sights.
You might look to an outfit called 10-8 and another called Harrison.I think I use the 10-8.That sight is not real expensive Its a little bigger,wider U-notch version of a GI type rear sight. I think they both lock in place with a set screw. That means they probably will go in easy.
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I use it with a large Trijicon round bead Tritium sight.The two work well together. Thing is,that Trijicon front sight is more than $50,not installed.It has to be staked in place and the tritium is in a glass vial.I think Trijicon will stake the sight in your slide for a reasonable fee.The proper tool for installation is expensive..IIRC,about $300. The vial is easy to break.
IMO,while a stake in front sight is not a real big deal,getting it right takes some care and skill. I would not suggest it as a way to lose your pistol smith virginity There are other stake in sights . Maybe fiber optic?
My justification for a tritium front sight is trouble often occurs at night.
Before you do anything,measure your existing sight heights and write it down. Check if you are shooting high or low. With that nfo you have a base line to get your sight heights right.
http://www.10-8performance.com/1911-nm-rear-sight/
https://www.brownells.com/handgun-parts/sights/rear-sights/1911-retro-rear-sight-prod31893.aspx
The thing is,at $30 something,that rear sight leaves you about $13 for your front sight and installation......which seems to say your budget of $50 is not realistic.
As far as feeding,I'd start with some good magazines. Another part critical to good feeding is a properly tuned extractor. You might leave that to a good gunsmith,and I'd expect he;d like to put in a hgh quality extractor.Just smile and pay the man.
I'd take care of those before I even wondered about the feed ramp.
I bought an ATI for my Son in Law. IMO,its a pretty good gun.I upgraded the sights,and a few other parts.(Slide stop,hammer,trgger,sear are Ed Brown/Cylinder and Slide Duty and Carry)
Some others may snear at the ATI,but I saw the ATI as a better gun than the Croatian Springfield Mil Spec I worked on. It had correctable but disappointing problems..like a plunger tube falling off,the sort of battered burrs on the chamfers of the frame mortice for the barrel underlug that would just about require running the mill spindle in reverse..This burr was snagging and marring the barrel underlug. The feed ramp was shaped by some line worker with a die grinder who gave the feed ramp the profile of a beer belly.Rounds stripping out of the mag hit the near vertical "navel" area of the feed ramp,and stopped.
The Springfield may have more snob appeal,but I'd rather work with,and trust,the ATI. Don't under rate your gun. It would cost just as much to upgrade the sights on a $1000 mil spec 1911 if you did not like the sights.
Gunsmiths don't work cheaper on a $400 gun.