If your musical tastes include 50s, 60s and 70s rock, pop, and jazz music, and you already have a reel to reel player in good working order, then by all means seek out some factory recorded reel to reel tapes.
Compared to LPs, reel tapes don't have:
ticks, pops, or scratches
groove noise
inner groove distortion
cartridge tracking error
tonearm tracking error
phone equalization errors
phono stage noise and hum
Also, assuming starting with a two channel mixdown master of the same recording, there are fewer than half of the steps needed to duplicate this master to 4-track tape, than to master an LP record. So your end product is only 3 generations removed from the original, instead of 6 or more for an LP. Each step in the duplication chain adds noise and distortion, and degrades the original waveform to some degree.
Most 60s LPs had the bass frequencies EQ'd off of the LP mastering tape, or summed to mono in a phantom center channel, because the average consumer phonograph cartridge of the period could not handle low frequency signals cut into a record without jumping out of the record groove. The result is that many vintage 60s rock recording released on vinyl are bass shy. This bass rolloff was not necessary for going to reel tape, and many of the factory reel tapes have huge levels of bass energy recorded onto them. Even CDs, if they started with the EQ'd LP master, lacks the definition and punch of some of my analog recordings released on reel to reel tape. Reel tapes also have a greater frequency response and dynamic range than LPs, even greater than the range on audiophile LPs.
The audible nasties on reel tape are few:
Tape hiss, usually less noticable at 7-1/2 inches per second record/playback speed than at 3-3/4, but the difference is not that great and many of my best sounding reel tapes were recorded at the slower speed. Tape hiss is usually only audible during the quietest passages and is less distracting than the random ticks and pops frequently heard on LPs.
Print through. Sometimes you can hear a sound imprint of the previous or next layer of tape overlayed onto the part being played, due to the magnetic properties of recording tape.
Drops outs. Surprizingly few for tapes that are in some cased 40 years old.
So far, I have been able to find most, but not all, of my favorite recordings from this period on reel tape. A few, such as DSOM, as far as I can tell were never released in the ree- to-reel tape format (DSOM was released in 8-track and cassette format along with vinyl). The others, I keep scouting eBay hoping to find.