Shane-O :
Thanks for all the recommendations guys, this is my first PC build as you could probably see so I'm new to all this stuff. I'm on a bit of a budget but I'll try fit in the Z270 it's pretty much double the price of the B250m.
The main reason for going for a Z270 motherboard (and a RAM speed higher than 2400MHz) is that
you intend to overclock your CPU (and RAM). Since this is your first PC build, and you are on a tight budget, you have to think ahead if indeed you see yourself wanting to try out overclocking soon to justify the expenses you will make for a Z270 motherboard and a 2666MHz to 3200MHz RAM.
Otherwise,
if you are very sure that you will
never overclock, then, money could be well spent with just a B250 motherboard paired with a 2400MHz-speed RAM (in the case of an Intel Build such as yours).
In an Intel Build with a Z270 motherboard and higher speed RAM, you will have an opportunity in the future to get the i7-7700K (a ~$480 CPU). Note that you also have to spend for an aftermarket CPU Cooler (as the i7-7700K doesn't come with one) around ~$50 to ~$70. So, you are looking at spending for more than ~$550 for that upgrade alone (plus the additional expenses you will have to make converting the B250 to a Z270 motherboard).
Alternatively, if you want better price/performance, you could take a closer look at the
AMD Ryzen 5 CPU's (specifically the Ryzen 5 1400 or the Ryzen 5 1600). These CPUs, are all overclockable and has more cores/threads than their Intel counterpart - not to mention, cheaper, has lower TDP (power consumption/heat) and comes with a decent CPU Cooler out-of-the-box.
If you are willing to spend ~$1200 based on your initial parts list (i.e., B250 mobo) + ~$100 for a PSU (not yet included in your parts list) and up to ~$1800 (if you upgrade to an overclockable Intel CPU with a Z270 mobo), here's what you can get for only ~$1560 using a Ryzen Build (overclockable Ryzen CPU + 16GB 3200MHz RAM + 275GB SSD):
PCPartPicker part list /
Price breakdown by merchant
CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor ($295.00 @ PCCaseGear)
Motherboard: ASRock - AB350M Pro4 Micro ATX AM4 Motherboard ($119.00 @ Mwave Australia)
Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3200 Memory ($193.00 @ Shopping Express)
Storage: Crucial - MX300 275GB 2.5" Solid State Drive ($128.00 @ Shopping Express)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($63.00 @ Shopping Express)
Video Card: Gigabyte - GeForce GTX 1050 Ti 4GB Video Card ($218.00 @ Umart)
Case: Thermaltake - Versa H25 ATX Mid Tower Case ($57.00 @ Shopping Express)
Power Supply: Corsair - CXM 550W 80+ Bronze Certified Semi-Modular ATX Power Supply ($95.00 @ Shopping Express)
Optical Drive: Asus - DRW-24B1ST/BLK/B/AS DVD/CD Writer
Operating System: Microsoft - Windows 10 Home OEM 64-bit
Wireless Network Adapter: TP-Link - Archer T6E AC1300 PCI-Express x1 802.11a/b/g/n/ac Wi-Fi Adapter ($68.00 @ Shopping Express)
Monitor: Asus - VC239H 23.0" 1920x1080 60Hz Monitor ($195.00 @ Umart)
Keyboard: Razer - DeathStalker Essential Wired Gaming Keyboard ($59.00 @ Centre Com)
Mouse: Razer - DeathAdder Chroma Wired Optical Mouse ($69.00 @ Shopping Express)
Total: $1559.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-09 22:06 AEST+1000