Just made a few of these over the last month. My favorites was a red wine base marinade, I just made one up, you can find them readily. I added a saute of mushroom upon serving.
The other one is Stubbs Beef Marinade. I typically don't use off the shelf, but for beef this one is becoming a favorite. Thanks to recommendations from folks here I gave it a try. I do tend to dress things up a bit though. I chopped in some garlic, shallot, some woosty.
This cut also behaves well with a basic dry salt brine treatment (20 minutes). Then dress with you favorite simple rub, etc.
Definitely wants rare, medium rare and make sure to cut across the grain. About 4 minutes a side direct is about all it needs.
It does take marinades well IMHO.
Good cut for fajitas - simple Italian style marinade should work well for that.