If you're looking into a budget system (I build them), I would say the first step is to determine your expectations.
For instance, you'd want a minimum of a dual core I'd suggest Quad Core and an
AMD Phenom X4 is a great pick and ~70$. From there, the motherboard you pick isn't that important I like MSI generally, but they put a max of 4 USBs in the back and people these days like 8-10, which other manufacturers will do. You can get a case for 20-50$, botherboard should be around 70-80. RAM you're going to want at least 4gigs (2x2GB) since you'll be running photoshop x64. the HDDs I'd go with some Western Digital Drives, I'd get a faster for your OS something either 7200rpm or 10000rpm - I use a 10k atm and love it (no funds for SSD or 15k rpm HDD). Then, you'd pick a bigger, much slower HDD for your media (i.e. your photos). I would suggest at minimum a 5200rpm 500g drive.
The smartest thing to do here is to get two 500GB drives (~50$ each) and set them up in mirror raid. That means the computer will see them as a single drive, so everytime it writes something to one, it writes it to the other - hence Mirror RAID. This way you lose 500GB of space BUT if one drive fails, the other is an exact copy = no work lost =
Those would be my suggestions.. I'd say with a generic NVIDIA vid card you're looking at a 450-500$ build that will serve you well for Photo Editing. If you need more help with components I'd be happy to take 10-15m to put together a system for you @Newegg. If you're looking for built systems honestly I'd say hang out on
Woot® : One Day, One Deal? until they get a nice refurb. I'm always amazed at the prices they offer on those (250-400$) for the specs they have.
The important thing to remember is that if you're going low cost it'll be when you're picking a lens. If you go for a high CAPACITY HDDs then you'll have to get slower drives to offset the cost or if you get FAST HDDs you will get much less space. I see 1TB HDDs on Newegg and Woot going for 40-50$, which is excellent. Buying 2x1TB HDDs and putting them in Mirror Raid is something I suggest to ANYONE that values their photographs. I've seen people do Mirror Raids that include 4 HDDs; producing 3 redundant drives that have their photos incase the first three fail. I digressed there for a bit, srry.
Any way, manage your expectations and look around, I've been building PCs for myself and friends for about 7 years now and its such an excellent value and not really that hard (lets be honest).
p.s. I didn't touch the Monitor at all because there you can't skimp and its all about budget, but I will say if you put together a system for cheaper, the Monitor Budget will be bigger
