What cam should I get?

In the end, so long as you're happy, it really doesnt matter what we use...lol. It's all opinion. IMO, Mopar makes some good cams, my issue is they dont make them very well. If your's runs well and it didnt need serious adjustment to get the centerline right, count your blessings. I install cams that work, and the are made well. MP can only get 1/2 of that right consistantly. The last MP cam I used needed 8° of advancing offest keyway to get the installed centerline to where MP recommends it. Nevermind the additional 2° I wanted it at. That took another offset keyway on the crank. The same timing set on that engine was 1° off with the Comp I installed after the MP. That was 5 years ago. I have run one since then, that required 4° to get right. With Comp and Crane, i have neever had to move it more than 2° to reach what the manufacturer spec'd. I figure, I am checking the centerline, I cant check everything. And that's fairly easy to get right..If they cant get it to match the cards they print, what else is wrong that I cant check?

You should be running deisel grade oils. Standard 10-40 Valvoline is not good for your valve train. Either run deisel (Fleet grade) or the "race" oils, or add a can of Comp Cams' additive or GM EOS. I also only use Wix produced oil filters. They are about $6 each, from Car Quest, Napa, and various retailers. I also run CQ 15w-40 Fleet oil in all my cars with flat tappet cams. It's like $1.29/qt by the case IIRC.

As far as vaccum advances, they dont help peak power at all. That's because at full throttle the addvance does nothing, no matter what vaccum source it has. But, at part throttle, say cruising in hilly areas, light throttle accel (like passing without flooring it), and straight cruising rpm/load the vaccum advace keeps plugs cleaner, and adds a ton of gas milage. Those are the times it's noticed. Street driving. Not racing. At some point, the cams used are so far out of the adjustment range of the std vaccum dashpot that it will only hurt the way the engien runs. So you find more "racey" packages with it not used. It's another thing to tune and properly set up. It hurts nothing, only gains. That's a fact. It's an oversight if someone doesnt run it IMO. But again, that last part is just an opinion.