New build for work

If you shop around, you should be able to find this for $750. It's going to be hard to get what you asked for, for less. The i3-3225 has high end integrated graphics (HD4000). This should be able to handle Photoshop just fine and save you money on a GPU. If you insist on a GPU, you can save money with the i3-3220.
The mechanical keyboard, IMO, is out of the question for $750 w/ a 23" monitor. The IPS monitor I picked will look better than a non-IPS.

PCPartPicker part list: http://pcpartpicker.com/p/DeGa
Price breakdown by merchant: http://pcpartpicker.com/p/DeGa/by_merchant/
Benchmarks: http://pcpartpicker.com/p/DeGa/benchmarks/

CPU: Intel Core i3-3225 3.3GHz Dual-Core Processor ($136.99 @ Amazon)
Motherboard: ASRock H77M Micro ATX LGA1155 Motherboard ($69.99 @ Newegg)
Memory: G.Skill Sniper 8GB (2 x 4GB) DDR3-1600 Memory ($39.98 @ Outlet PC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($75.00 @ Amazon)
Case: Antec One ATX Mid Tower Case ($51.24 @ Amazon)
Power Supply: SeaSonic 300W 80 PLUS Bronze Certified ATX12V Power Supply ($43.98 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($21.98 @ Newegg)
Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit) ($135.62 @ Outlet PC)
Monitor: Asus VS239H-P 23.0" Monitor ($174.99 @ Best Buy)
Keyboard: Logitech MK120 Wired Slim Keyboard w/Optical Mouse ($16.89 @ Amazon)
Total: $766.66
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-13 02:07 EST-0500)

Again, shop around. Plan for shipping. Sometimes you can save money on shipping by combining orders, even though you're paying a little more for the part. I would also suggest looking for open box parts from newegg. I just bought a ASRock Pro4 mobo for $89.99, normally about $124.99. They are still covered under return policy. Tweak the list all you want, but most of all, SHOP AROUND AND PLAN!

Regards

Just inside the $750 budget

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i3-3220 3.3GHz Dual-Core Processor ($123.79 @ Amazon)
Motherboard: ASRock B75M-DGS Micro ATX LGA1155 Motherboard ($59.98 @ SuperBiiz)
Memory: G.Skill Sniper 8GB (2 x 4GB) DDR3-1600 Memory ($39.98 @ Outlet PC)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($58.98 @ Outlet PC)
Video Card: PowerColor Radeon HD 7750 1GB Video Card ($83.98 @ Newegg)
Case: NZXT Source 210 (White) ATX Mid Tower Case ($29.99 @ Newegg)
Power Supply: Antec 450W ATX12V Power Supply ($39.99 @ Mac Mall)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($21.98 @ Newegg)
Operating System: Microsoft Windows 8 (OEM) (64-bit) ($89.98 @ Outlet PC)
Monitor: Asus VS239H-P 23.0" Monitor ($174.99 @ Best Buy)
Keyboard: Logitech MK120 Wired Slim Keyboard w/Optical Mouse ($16.89 @ Amazon)
Total: $740.53
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-13 04:52 EST-0500)

I just picked up this 23" Dell IPS monitor from newegg.com for $169.99 after 40% off. If it's not too late, snag it! I love the monitor. Love it. The stand is good unlike most around this price.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...