which is better to buy, a better mobo or a better gpu?

newpcuser

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Oct 6, 2013
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Hi guys! I'm having a bit of trouble deciding which should i buy first:
a good mobo + better gpu or
a better mobo + good gpu?
b75 + hd7770 or
z77 + (hd 5570 2gb or 6570 2gb or 6670 1gb-- all ddr3)

I really have a tight budget right now only about 185$ or 8,000php for the two and i could only have one combination of the two because currently i've set my mind on buying

i5 3570 with/ without K
4gb of ram ( i will upgrade it to 8 gb in the near future :))
the others, i think, are not worth mentioning anymore :))

btw i'll be playing lots of mmorpg, maybe cod, crysis 3, skyrim. is this possible with my above parts? would there be bottleneck if i upgrade it to my ideal build which would be
i5 3570+z77+hd 7770+8gb ram+ 1tb hdd sorry for the bad english hehe
 

newpcuser

Honorable
Oct 6, 2013
25
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10,530


okay then.. but will my ideal build be enough for those games? and will there be any bottleneck? btw thanks for the fast reply