what are y'all working with? what size, resolution, panel type? ultrawide, curved, hdr, or g-/freesync?

i'm in the market for a new monitor that will mostly be used for gaming. 1440p, 27", and good gaming specs like low response time, high refresh rate, etc. are a must. hdr, g-/freesync are nice bonuses. after doing a lot of research i have it narrowed down to three:

• 27" or 32" samsung cjg5 (possibly the chg70 if hdr/freesync are legit): https://www.newegg.com/Product/Product.aspx?Item=N82E16824022735

• AOC agon ag271qx: https://smile.amazon.com/gp/product/B01G5JYN0C/ref=ox_sc_saved_title_1?smid=ATVPDKIKX0DER&psc=1

• msi optix mag27cq: https://smile.amazon.com/gp/product/B079NGSWRL/ref=ox_sc_saved_title_4?smid=A17MC6HOH9AVE6&psc=1

does anyone have any experience with the above monitors, or even the brands? where is HDR in 2019? what are your thoughts on g-/freesync? what about gaming on a VA or IPS panel? any and all opinions and advice are welcome