Hey Mary,
What LED monitor are you using?
And, what resolution are you working at?
Took far too long to find the specs, but looks good as they have rec 2020 included:
𝗖𝗨𝗦𝗧𝗢𝗠 𝗖𝗔𝗟𝗜𝗕𝗥𝗔𝗧𝗜𝗢𝗡
𝗙𝗘𝗔𝗧𝗨𝗥𝗘𝗦: For users wanting more advanced calibration features,
X2 Elite includes Video & Cinema Targets (Rec. 709, Rec. 2020);
Advanced Display Mapping & Analysis; Unlimited Calibration Settings;
Soft Proofing; and Studio Match for multiple monitor calibration.
And, it is on offer right now (UK).
But if you are aiming for HEVC, they suggest the X2 Ultra to be a better choice:
Dаtасоlоr Ѕруdеr Х Ultrа 2 Кеу Fеаturеѕ:
Аdvаnсеd соlоurіmеtеr fоr саlіbrаtіоn оf dіѕрlау соlоur ассurасу
Мах lumіnаnсе mеаѕurеmеnt оf 2000 nіtѕ, реrfесt fоr НDR dіѕрlауѕ
Ѕtudіо Маtсh аllоwѕ fоr сrоѕѕ-dіѕрlау соnѕіѕtеnсу wіth thе саlіbrаtіоn оf 3+ mоnіtоrѕ
Rаngе оf fеаturеѕ thаt аnуоnе frоm bеgіnnеrѕ tо ехреrtѕ wіll аррrесіаtе
Wоrkѕ wіth dеѕktор mоnіtоrѕ, аll-іn-оnеѕ, lарtорѕ аnd рrојесtоrѕ
Dіѕрlау аnаlуѕіѕ аnd mарріng fоr а соmрlеtе rundоwn оf dаtа
Вuіlt fоr uѕе іn brіght lіght ѕеttіngѕ ѕuсh аѕ оutdооr dіѕрlауѕ
Ѕоft Рrооfіng fеаturе fоr іn-dіѕрlау соlоur рrоfіlе ѕіmulаtіоnѕ
UЅВ-С соnnесtіvіtу wіth UЅВ-А аdарtеr fоr оldеr ѕуѕtеmѕ
Fіvе bасklіght орtіоnѕ fоr dіffеrеnt lіghtіng ѕсеnаrіоѕ
Іdеаl fоr рhоtоgrарhу аnd vіdео соlоur grаdіng
Ѕuрроrtѕ Rес.709 оr 2020 соlоur ѕрасе tаrgеtѕ
ОЅ соmраtіbіlіtу wіth Wіndоwѕ аnd МасОЅ
Hope that this helps?
Atb
Mads
PS: After writing this post I did further research. If you in the future are looking at 10,000 nits and/or want to calibrate and OLED screen. For little more, you may want to consider the Calibrite Display Plus HR:
https://calibrite.com/product/display-plus-hl/
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