Which Antec ATX Case Do I Use, Please?

Hey all,

I'm rebuilding my own PC for Battlefield 3 & will use one of these Cases. The case I don't use will be used to rebuild my folk's HTPC. Help me decide which Antec ATX case to use for my Gaming PC, as I upgrade here?

My current case of 6 years is an Antec SUPER LANBOY Silver anodized aluminum ATX Mini Tower Computer Case. I love it, bought it for $100 six years ago, & it's still LIKE NEW! It's lightweight, has the cool, 3.5" HDD trays you slide in from the side. It has two, 120mm, blue-LED fans in it, etc. Here it is on Newegg: http://www.newegg.com/Product/Prod [...] 6811129145

I also just received this new Antec Three Hundred Gaming Case (includes one rear 120mm & one top 140mm Tricool fan) today: http://www.newegg.com/Product/Prod [...] 6811129066

My Question is: Which Case should I Use & Why, please? I'm leaning towards reusing my Super Lanboy. THANKS for you help in deciding.

Here are my Gaming PC's internals:

Intel Core i5-2500K Processor 3.3GHz 6 MB Cache Socket LGA1155

Biostar TZ68A+ LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard (I use my MB's onboard Audio & Bose satellite speakers & a sub-woofer)

Corsiar Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600

XFX HD-687X-CNFC Radeon HD 6870 2GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP, here:
http://www.newegg.com/Product/Prod [...] 6814150563

OCZ Agility 3 AGT3-25SAT3-60G 2.5" 60GB SATA III MLC Internal Solid State Drive (SSD) (My OS & BF3 installed here)

WD 1TB 3.5" SATA-III 6Gb/s Hard Drive

Cooler Master Hyper 212 Plus 120mm Sleeve CPU Cooler

Antec BP550 Plus 550W ATX12V V2.2 Modular Power Supply

2 of: Kingwin 120x120mm Long Life Bearing Blue LED Case Fan

Vantec SP-FC70-BL Spectrum System PCI Fan Card with Dual Adjustable 70mm UV LED Fans (Blue)

SilverStone AEROSLOT Maximum Vented PCI Slot Covers

SILVERSTONE SDP08 3.5 to 2 X 2.5-Inch SSD Bay Converter

Hanns G 23", 2ms, Widescreen Monitor

and Windows 7 Ultimate 64 bit OS

Thanks Again.