That Flux Nerd

Linus said "I'm fine" so much, I'm thinking he could become an ace attorney.

I recently built my new rig (upgraded from Core 2 Duo, don't ask). The only thing that's left for me to upgrade is the keyboard (I currently have a Tracer Octavia) and monitor (currently - LG Flatron L192WS). I have two offers: I can either buy a brand new A4Tech Bloody B418 with 8 LK optical switches on QWER and ASDF keys or a used Steelseries Apex M300 RAW. Both are backlit, both have similar prices (B418 costs 35$, converting from PLN; RAW costs about 30$). Which one should I get? I did check out both of them, I have to get used to the B418, because it doesn't have that nice clicky tactile feedback I like.

I have heard that the Brutus has dust filters which is a huge plus for me, as my PC will be on the floor (probably), dunno about the other two though. Other than that, I don't really have any more.

I'm buying a new PC, upgrading from my 8-year-old Pentium Dual Core with 9600 GT with a shitty Asus Vento A8 and I cannot decide between a few new cases - BitFenix Nova (recommended by /r/PCMasterRace), SilentiumPC Brutus M25 and SilentiumPC Regnum RG1W. Here are my future specs. Prices are in PLN, which is around 0.25 USD per 1 PLN. Which one should I buy? EDIT: GPU won't necessarily be a RX 480, but rather GTX 1060, depending on benchmarks.

I have a 9600 GT. Enough said.