GMAT Strategy

Hey! I'm new to this forum and I am currently planing which books I'm going to buy in order to prepare for the GMAT.

I will have about 3-4 months to learn and I want to reach 650+ points ( would prefer 700+ though ).
I am not a native speaker and I wouldn't say that I'm extraordinary good at speaking/reading/understanding english(B2-C1 level). Therefore the verbal part will be a bit more difficult for me I guess.

I read some study plans, book reviews and debriefs on this site already and came to some conlusions regarding the choice of the books and I would be very thankful if you could help me adjust my choices.

Verbal:

-Manhattan GMAT Foundation of GMAT Verbal
(I consider this a good introduction of the basics for a non-native speaker like me)
-Manhattan GMAT Sentence Correction
(From the reviews I read it seems that this is the best book available for Sentence Correction and therefore a must buy)
-For Critical Reasoning I can't decide between Manhattan GMAT CR and PowerScore GMAT CR Bible
(It seems that the Bible is a bit more thorough but I'm not sure if it's worth the extra time investment. Also this might be the only book I would buy that is not a MGMAT book. So I'm not sure if it's better to buy all books from one series.)


Quant:

-Manhattan GMAT Number Properties
-Manhattan GMAT Geometry
-Manhattan GMAT Word Translations (Not sure about this one because I couldn't find a bigger review on it)

Are those good choices? Are those the most important books of MGMAT? Is it good to buy MGMAT only anyway or is it better to mix it up and take the best books from each provider/series?
Is it too much for 3-4 months?

Thanks in advance!

PS: I'm fully aware that the official GMAT question books are a must have. So this is just about the strategy guides etc..