Upgrading E1 M28. Help?
 

Hey guys. After getting alot of help yesterday I've decided I'm going to get the E1 M28 as a base gun and build from there. Now I have about 230$ to buy upgrades but I don't know what fits. Ive heard alot about the 45 degree sear and how it's a problem. Would these parts fit in it and are they the best choice for my gun?
http://www.evike.com/product_info.php?products_id=35609

Also do you think I should get a new trigger or would the stock one hold up against the beating it's going to get? So basically what parts would you recommend upgrading first with 230$ Any links with parts compatible with the gun would be awesome as I will be basing what I get off of this post. Thanks a lot. Tanner