Agreed, Saturn ports are generally okay, but not as good as the originals. If you want a cheap alternative to homecarts, I would recommend:
1.Check the tech section to see who's selling consolized MVS boards. I believe you can get one for a few hundred bucks or so, and it will let you play MVS carts cheaply.
2.Buy a Super Gun, add an MVS board and you are set. Might be a tad more expensive than option 1.
3.Buy a Neo*Geo CD system. On the plus side, you get cheaper games, exclusive games, built in S-Video support and remixed soundtracks. On the down side, you have those evil load times everyone talks about, and the occasional missed frame of animation. You can probably get a boxed system for around $150-$200, and the games are cheap and readily available.