By accepting Hadith you automatically reject it.

So which Hadith claim should we take up as true and which Hadith should we reject and why? And I am still at the entire collection level.

Logically the Sunnah of the Prophet Pbuh cannot be any different than the verifiable official message of God he himself delivered, publicly, as per the instructions of God and described by God as the best Hadith, the best Tafsir, non-other than the Quran and nothing but the Quran. If you ignore this first verified Sunnah then anything you follow will be a mere exercise without any warrant or purpose.

Of course you always have the option to throw a dart in the direction of the following collections and see where it lands and take that as the one "true" Sunnah and be prepared to be declared a "Kafir" by the followers of all the rest :) Mind you, all of them are claimed to be vetted through the same magical "Science" of Hadith. Needless to say, each and every one of them ignores the all important  public delivery uncompromising condition of the official message and hopes nobody will notice that 99.9% of them are single third party narrations, the opposite of public.

1. Kutub Al-Sittah - (The six books of Sunnis )
Sahih Al-Bukhari ( صحيح البخاري ) Sahih Muslim ( صحيح مسلم ) Al-Sunan Al-Sughra ( السنن الصغرى ) Sunan Abi Dawood ( سنن أبي داود ) Sunan Al-Tirmidhi ( جامع الترمذي ) Sunan Ibn Maja ( سُنن ابن ماجه )

2. Al-Kutub Al-Arb'ah - (The four books of Shias)
Kitab Al-Kafi ( الكتاب الكافي ) Man La Yahduruhu Al-Faqih ( من لا يحضره الفقيه ) Tahdhib Al-Ahkam ( تهذیب الاحکام ) Al-Istibsar ( الاستبصار )

3. The Ibadi one Jami Sahih Tartib Al-Musnad

4. The Mu'tazila collection Comments on the Peak of Eloquence
 

Now comes the fun part, with the possible exception of the Ibadi collection, each and every other collection has an interesting thread running through it. All the collectors were Persians and almost all of them appeared out of nowhere right after the defeat of the Persians. You just need two functioning brain cells to figure out the rest. Now all throw in Muwatta Imam Malik Musnad Ahmad Ibn Hanbal Sunan Al-Darimi Shama'il Muhammadiyah often referred to as Shamaail Tirmidhi Sahih Ibn Khuzaymah Ṣaḥīḥ Ibn Ḥibbān Al-Mustadrak Alaa Al-Ṣaḥīḥaīn Al-Mawdū'āt Al-Kubrā Rīaḍ As-Ṣāliḥīn Mishkat Al-Masabih Talkhis Al-Mustadrak Majma Al-Zawa'id Bulugh Al-Maram Kanz al-Ummal Zujajat al-Masabih Minhaj us Sawi Muntakhab Ahadith The Book of Sulaym Ibn Qays Al-Sahifa Al-Sajjadiyya Uyun al Akhbar ar Reda Sharh Usul al-Kafi Nahj Al-Balagha Wasā'il Al-Shīʿa Bihar Al-Anwar Haqq al-Yaqeen Ain Al-Hayat (17th century) Qalam-e-Mowla Daim al-Islam ETC ETC

I wish it was as simple as choosing a version or two and you were done. Not so fast as the saying goes, even after settling for a particular version you are still totally dependent on the "scholars" associated with that particular version to tell you what to believe.

No matter where the dart lands, in essence it will still be no more than a game of "my scholars are better than yours". I for one refuse to assign my eternity to this crapshoot.

And then of course there is the problem of Quran 9:101 which will not go away