I also have a set of three vinyl LP's of Handel's Messiah with the Royal Philharmonic orch. conducted by Sir Malcolm Sargent and Royal Choral Soc.(Reader's Digest) and this persuaded me to get a CD version. I much prefer the slower tempo of Sir Malcolm Sargent's conducting than others I've heard. My favourite tracks are "Behold the lamb of God" and "Worthy is the lamb" which ends with the amen chorus. Absolutely superb from beginning to end!
If you already have Messiah, buy this version and compare. You will not regret it!