Recommendation for new highlighter?

[Power Play]

After 20 years of enjoyment of my Mont Blanc 'Document Marker' it seems to finally found it's way into someone else's hands during a recent business trip.

While I could simply replace it, this seems like a great opportunity to try something new.

Priorities are as follows (in no specific order):
* Quality
* Some heft/size
* Ideally no brass; silver and/or platinum would be better
* Refills readily available

To give you an idea of where I'm coming from, my current watch collection consists of Rolex Sub (14060, Sea Dweller, Deepsea), SS Platinum, Pepsi, WG Daytona, Omega PO, IWC Aquatimer.

Would also appreciate coaching on a good source to find your recommendation, if possible.

Thanks very much in advance for your advice!