Mesa,
Don't skimp on optics. I've owned and gotten rid of Tasco, Simmons, Bushnells, etc. Now, all my guns sport Leupold or Burris scopes. There are better scopes out there, but I've found great deals on used Leupolds/Burrises on a couple of the auction sites. Just take your time, and good deals come along.
For the 30-30, I'd look for a fixed power scope of no more than 4X. Better would be Leupold's VX-II 1-4X. I picked one up on auction for around $160 and am quite pleased with it.
However, if you want to try something different, check out Lyman's receiver/peep sight. The one for the Marlin 336 is number 66LA. I have one mounted on a Marlin 1894. It comes with two screw-in peeps. Use the smaller one for accuracy, the larger for hunting, and if you remove both, the housing serves as a workable ghost-ring.
Looks "authentic" to boot.
Shoot straight.
[This message has been edited by Legionnaire (edited November 05, 2000).]