Yes it is, I still wish I'd bought it and Capcom vs SNK when my game store still sold DC games...instead I got Bushido Blade for PS...still regret that decision.
I still got my Dreamcast, works like a charm. I still wish it had a longer run than it did, was a great system just got no love and had to go up against the PS2 (which I thought was pretty craptastic at launch).
It definitely had a solid fighting game library, and even the 2k Sports games were pretty damn good.
All the games recommended already are definitely worth picking up.