Help purchasing New Laptop

Hello and thanks to all here. I have enjoyed reading post on various topics and want to say thanks in advance whether you respond or not.

I am looking to get a new laptop (my toshiba keeps crashing and have sent to Toshiba 3 times to fix and still crashes and now sending to Assurion-Officemax for repair and hopefully refund...so Toshiba I am not thrilled with).

I am looking to purchase at walmart or sams due to having credit there.

I use my laptop for some gaming (WarCraft, StarCraft, Diablo, and might get into other games with newer system). I also use it to backup my DVD/BD's and as a sort of HTPC. I hope this helps with the encoding/decoding and gaming information.

I have narrowed it down to the following each with something different about the CPU or GPU but looks OK. I have tried to read the post about different graphics cards and more but am now getting more confused so I thought I might come to the professionals. I admit I get confused with difference in Intell 4000,4400,4600 and AMD's and NVidia's, especially where i read one post about AMD 8xxx series will support Mantle which I have read on lightly but looks promising.

I also know that a true gaming laptop will be very expensive which my budget is trying to go under 1100 and I do not want a desktop and laptop.

Here are the ones I am looking at:
http/www.samsclub.com/sams/asus-15in-touch-intel-core-i7-4500u/prod12860271.ip?navAction=
http/www.samsclub.com/sams/inspiron-15r-2yr-amd-a10-5745m/prod13400446.ip?navAction=
http/www.samsclub.com/sams/insp-15r-tch-ntbk-intel-core-i7-4500u/prod11550211.ip?navAction=push
http/www.samsclub.com/sams/asus-15-inch-nb-v551lb-sh71t/prod11440481.ip?navAction=push
http/www.walmart.com/ip/Dell-Silver-15.6-Inspiron-15R-Laptop-PC-with-Intel-Core-i7-4500U-Processor-16GB-Memory-Touchscreen-1TB-Hard-Drive-and-Windows-8.1/34206230
http/www.walmart.com/ip/Dell-Moon-Silver-17.3-Inspiron-17R-Laptop-PC-with-Intel-Core-i7-4500U-Processor-16GB-Memory-1TB-Hard-Drive-and-Windows-8.1/34390951?findingMethod=Recommendation:wm:RecentlyViewedItems
http/www.walmart.com/ip/Dell-Moon-Silver-17.3-Inspiron-17R-Laptop-PC-with-Intel-Core-i7-4500U-Processor-16GB-Memory-1TB-Hard-Drive-and-Windows-8.1/34696335?findingMethod=Recommendation:wm:RecentlyViewedItems#Product+Warranty+and+Service+Plan+Options

If for what I am doing most will suffice I admit that I would like to increase to a 17" display (but if 15 is far superior than will do).

Thanks for taking the time to read my post and I eagerly look forward to all thoughts and advice.

Sincerely,
David