-Should i get 1 or 2?
-Do guitar hero guitars work with RB 1/2?
-If yes to above would I be better off buying the bundle or just the game and drums/microphone?
-Is there a way to get singing related acheivements without actually singing (no microphone)
-Can I use a regular USB microphone instead of the RB one? (ya Im trying to buy as little as possible)
-Approximate costs?
-Is the game really worth buying?
-If im not that great at these sortve games would it still be enjoyable for the cost?
1. Rock Band 2.
2. Yes, they do. All of them (I don't know about Metallica) work for Rock Band. I used my GH3 controller, that's why I don't have the "Flawless solo" achievement for RB2.

3. I would buy the bundle. It's a lot cheaper than buying all of the instruments at different times and wasting money.
4. No, there isn't.
5. Yes, but the headset mics aren't as good as the RB2 one, so you're not going to be able to get as good of a score or get as many notes hit.
6. It was $129.99 for my drum kit alone, lol. I'm not sure about Guitars or the Microphones though.
7. Of course. They have a ton of songs you can buy from the marketplace, and there's some amazing songs on there.
8. Definitely, when I started out on Guitar Hero I sucked, bigtime. I then got a lot better. You just gave to give yourself time. You can go from Easy to Hard in a day. Just go bit by bit. OH, AND I FORGOT THAT YOU CAN PLAY WITH TONY AND ME ON ROCK BAND 2.