Glider is mostly considered as one of the best carts up to $1000, and if you go trough discusions, you will find many happy owners. So it might be very dependable on WHOLE sound system in use, not only raw-compatibility with table/arm/phonostage... And you first meeting with glider (was it at dealer, or someones personal system?) as pointed out was very positive, do not forget that.
To be specific, lets take Alison Krauss and R. Plant album - Raising Sand, with Glider I could not listen to it, the music was sort of compressed, uninvolving, and my verdict was poor mastering/release. I even brought this LP to dealer, and played with Benz Micro ACE. Feeling were similar - in totally different system. But with Denon DL103 - I CAN PLAY, listen, and enjoy this album.
I went with a basic version of Denon DL-103, "R" is 6N pure copper wire used in coils. There is a good thread here in audiogon about differences between R and basic versions. I like how mine sounds right now, I do not feel the need of upgrading the cart itself, just heavily buying used and new vinyl, and enjoying the music. Maybe thinking buying a SUT.