[Build Ready] How is this $400 build? Am I all set?

1x8 ram so you can add another 1x8 stick later for an upgrade.

r9 270 is much more powerful than a 750ti:

http://www.anandtech.com/bench/product/1080?vs=1130

Buy the case from best buy, it's out of stock on superbiiz.

PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU Intel Pentium G3258 3.2GHz Dual-Core Processor $59.99 @ Amazon
Motherboard ASRock H81M-HDS Micro ATX LGA1150 Motherboard $51.29 @ SuperBiiz
Memory Team Dark 8GB (1 x 8GB) DDR3-1600 Memory $49.99 @ Newegg
Storage Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive $57.19 @ Amazon
Video Card HIS Radeon R9 270 2GB IceQ X² Video Card $126.98 @ Newegg
Case NZXT Source 210 Elite (Black) ATX Mid Tower Case $49.99 @ Best Buy
Power Supply Antec EarthWatts Green 500W 80+ Bronze Certified ATX Power Supply $0.00
Prices include shipping, taxes, rebates, and discounts
Total (before mail-in rebates) $415.43
Mail-in rebates -$20.00
Total $395.43
Generated by PCPartPicker 2015-05-21 15:55 EDT-0400
/r/buildapc Thread