kulang yung 40k mo, sa monitor pa lang lampas kalahati na sa 40k (or baka mas mahal pa sa 40k yung monitor) if you want a resolution of 2048x1536. locally I dont think may makikita kang monitor na may ganung resolution (you will need at least around 27 inches for that resolution - mga korean brands). you can get a 30 inch monitor and get a resolution of 2560x1600
your next bet would be multiple monitors
as for processor ano ba gagawin mo sa computer? 3d rendering? video editing? if yes, then go for intel. if tipong gaming, internet surfing, etc, then go for AMD
mobo will depend on what CPU you get, for intel, get z87 chipset. for amd, a85 if FM2 chipset (if you get A10) or 990 for AM3 chipset (if you get FX). kaso lang very rare ang mga 990 mobos dito sa pinas
for ram, 8GB is more or less the appropriate number these days, unless you do 3d rendering, video editing, etc then you can benefit from getting 16GB or higher. as for frequency, 1886 and 1600 dont have that big of a difference in performance
for HDD, SSDs do offer a performance boost but mahal yung mga higher capacity. one alternative is the new hybrid drives. a 1TB seagate momentus XT hybrid is priced around 7K, whereas a 120GB SSD is around 5K and a 1TB SATA HDD is around 4K
for GPU, again depende sa needs mo. if you more into details then go for nvidia because they have hardware physx. if you aren't that concerned about the little things then you can go AMD. also if you go 3 monitors and you will only be using one card, AMD is better in handling 3 monitors. if you go two cards however, its not an issue