I went over w/o a monitor, did get the headset mouse and kb, but then again, if you had a xbox you could just sue that controller and hook up the system to your hdtv and just use steam big picture mode, and this would eliminate the need for a kbm, and bf4 works great with a controller. If you think a console is cheaper for you, don't forget 3 weeks after a 60$ console game is out its ~19 dollars on steam and your also going to get a lot of weekly sales. If you do chose to go with a higher budget, please do post back. If you have questions on building feel free to PM me.
Western Digital 1TB internal Hard Drive - Caviar Blue (3.5 inch) - Western Digital £46.51
Asus M5A97 R2.0 Motherboard (AMD 970/SB950, 4x DDR3, S-ATA 600, ATX, PCI-Express 2.0, USB 3.0, USB BIOS Flashback, Windows 8 Ready, Socket AM3+) – Asus £59.00