I agree with Downunder. Slow, dull and anemic may describe the listener, but certainly not a properly functioning XV-1s.
I've owned a Lyra Helikon and it is the fastest, most transparent cartridge I've ever heard. It sounded a bit lean in my system though. The Dynavector had more dynamics and power by comparison and was a bit fuller. Certainly not as full or warm as the Orpheus though.
Again, which will sound best will depend a lot on the rest of your system. My speakers are a tad warm, so the warmth of the Orpheus would be too much warmth in my system. The Orpheus sounded very good in my friends system, but his speakers are more transparent than mine. It's all about system balance.