Buying my 1st new LP in 42 years..Suggestions?

I would suggest a reissue of an album you already own. No better way to compare.

Thanks for your responses! I am investigating them on iTunes.
In response to whart...
Rock, Blues, Jazz, Big Band, Blue Grass, Baroque.
Steely Dan, Dana Krall, Norah Jones, Stanley Turrentine, James Taylor, Doobie Brothers, OZMountain, KebMO, David Sanborn, Christopher Cross, Darius Rucker, and Jimmy Buffett. I really enjoy listening to good recordings.. I enjoy hearing the sustain pedal on Diana Krall, fingers sliding over frets, etc... I remember listening to a quality Chet Baker CD that I thought was good.  Doug Macleod and Tuba Skinny are two recent discoveries. I don't like the Tuba Skinny recordings but love the music and Erika Lewis is fantastic.
I see 180g.. I don't know what that is... Are new Sheffield recordings still available?

You got 300 LPs including a stack of Sheffields and direct-to-discs and the first thing you want to do is buy another record??? First thing I'd be doing is picking through that stack! Second thing, buying a good ultrasonic record cleaner. Third, zero-stat. Fourth, Stylast or other good stylus cleaner. 

The only way my first move would be to buy a new LP is if the Reference Recording 45 rpm 2-LP set of Doug MacLeod Exactly Like This is not in your stash. If that is the case then please whatever you do drop everything and track it down. Music Direct, Acoustic Sounds and all the usual suspects are already back-ordered, with no telling when they will press more. You might find one on Discogs.com but whatever you do just make sure you find one. If you haven't heard it go look for Serious Doin Woman on YouTube.

See what I mean??

If you like Steely Dan try Donald Fagen “Nightfly” on 180 g vinyl. It truly is an audio file re-release

180g Vinyl is heavier than “regular” records. 2x ?  Not sure. 

“ whatever you want” is not really a helpful response.  Nor is “buy 2”.

The OP asked WHAT to buy. 

What car should I buy? Whatever you want as long as you buy 2. 

Bent

What type of music do you listen to? I have so many to suggest and they are all audiophile quality.