i still have eerie feeling to buy acer laptop. is it true timelinex line up more reliable than other acer aspire line up?

im in love with long battery life and powerful spec that comes with affordable price. but sked 1 month use, got problem..

thinking of asus A42JP but it has short battery life. please, anyone can enlighten me about this laptop, is it wise to buy this laptop? coz i need to use it until finish study. about 4-5 years from now.