Weight and balance on your rod are factors. I think that for most halibut fishing, you'd be happy with the Penn 330 loaded with 65# or 80# Power Pro or equivalent line.

Avoid the cheaper rods and especially those with the cheap roller tips if you want a roller tip. Shakespeare makes a pretty good stand-up rod with roller guide and tip in 5'6" and 6' for around $75. Check with your local sporting goods store.