Hi Everyone!

Need some input on some GMAT resources. Please advise if I've picked a good resource and/or if you know of a better book.

Math - I've picked up the 5 math strategy guides form Manhattan.
- Got OG 12 to go along with it
- OG 12 companion from GMATfix.com
- VIP tests from Jamboree

Verbal - OG 12
- Manhattan SC guide
- Thinking of buying the Powerscore CR bible - does anyone know where i can get an e-book from?
- OR should I also get the Manhattan CR & RC guides?
- Any other good sources for Verbal?

I would really appreciate it if I could get some input here. I'm at 550 right now and reallllllllllllly need to push my score up to 650+ in two months. I need resources which are challenging but also give really good explanations.

tHANKS ALOT!!