Roller cams are about twice the cost of a flat tappet cam.
The only con with the flat tappet stuff is the rain dance that you have to go through with the cam break-in.
If you go that route, my advice would be:
1. Leave the inner springs out
2. Use plenty of cam lube on the lifters/lobes
3. Have the distributor/carb set so that it will fire immediately
4. Run Brand Penn or Joe Gibbs break-in
oil