Lyra Delos

I haven't owned a Glider in over 10 years, so it's quite a while for me to go on memory. Also, I have never heard the Delos, but I have owned a Helikon. The Helikon is probably the fastest, tightest cartridge I ever owned, though I would say it was a bit too lean for my tastes. You say that you are looking for "a little more" detail and extension, I would think the Lyra would give you a LOT more.....though this may or may not suit your tastes.

Another cartridge to consider is a Dynavector XX mk II.

Lyra Helikon is a great cartridge. Some think, newer is always better, but that one was (is) really good. It has a superb overall tonal Balance. Delos is good, Zyx are also very interesting, they are uncritical to Arms and the Fuji RS is really hard to beat for the money...

I use a Delos with a VPI Traveler and all other components are the same as yours for the electronics and the result is very satisfying with much detail,depth and warmth.