ZotteStef - No Problem...
I'd say go with NewEgg for many purchases... check local, some good deals here and there.
1 - About the CASE: I recommend you check some out at some local stores. Sometimes PICS don't do it justice. Like those 2 Antec cases are a bit hard to tell from first glance - When Antec made the P180 - it was a great design, but for people like me who DON'T like a cover over the front of the system, they soon made the P150/Solo (P150 includes a very good 430watt NEO PSU and its in a white-WHITE case instead of black). - I bought the P150. It'll hold 4 HDs and 3-4 Optical drives... even a floppyjust built a SOlo with a SONY Floppy drive.
Check out THIS old link I keep handy with various caes. Go to the LAST post on this page:
http://forums.techguy.org/hardware/518146-need-help-choosing-case.html
2 - LiteOn is fine. Even my current DVD burner is an even less known no-name brand (It was $50 vs $100 Pioneer/Sonys etc) - but prices are down cheap. My Lite-On keyboard is almost 10 years old... better built than most of todays crap.
3 - CPUs: For avg user, save $50~150 by going with AMD over a Core2 or P4/PentiumD systems. Especially in the sub $1000 pre-built price range where standard low-cost RAM is used. AMD is a bit slower than a Core2 : The AMD X2 5000 is a bit slower than the Core2 6600.
Quake 4 in 1600x1200 with GF 8800GTX
Core2 6600 = 156fps = about 10% faster than AMD.
AMD 5000+ = 140fps (okay not noticable, but get the 90nm size version)
AMD 5000+ = 134fps (The new 65nm version is even slower)
AMD 4600+ = 130fps
Oblivion 1600x1200 (This is about a 25% difference)
Core2 6600 = 107fps
AMD 5000+ = 82fps
AMD 4600+ = 77fps
Core2 6600 CPU = $270~320. AMD 5000 = $250~300 CPU.
I personally would likely still go with AMD, still a bit cheaper with Mobo as well, and I'm not going to make a big deal over 10fps with a game running over 90fps.
Gotta warn some folks who think ALL intel is the same and because Core2 is faster, a typical person may think that ALL Intel = faster than ALL AMDs.
Check out pricing with
www.pricewatch.com
4 - logitech mouse. Wireless is supposed to be a lot better now (for gaming) - but I too bought a wired mouse... (Saved $8) At the time I had a GF with a toddler living with me. But I have a wireless as well that works great too.
5 - floppy, make sure you tell bios not to boot with it.
6 - The BenQ looks cool. They have some interesting designs. Check out this one in the store:
http://www.samsung.com/Products/Monitor/LCD_Digital/LS19MEWSFXAA.asp Otherwise, lately - Samsung is catering a bit more towards the LOWer end market for $$$. BTW, they sell so many types of monitors, they can't keep up with them on their own website!
7 - Still don't know about an SB Audigy4 vs todays onboard Nforce boards which support 7.1 audio. I haven't had an Audio card since my SB-Live! The Audigy2 I have is defective and CL never got around to properly replacing it. For a Dream PC, I'd get an X-Fi card ($100~300) - Look at the Exteme Gamer or Fatility version...
8 - That BenQ keyboard... I saw it about 3+ years ago, I was trying to put it with a PC I designed...

its very cool looking.
PS: When looking at mobo, look into Asus, MSI and Gigabyte.
PS2: Go with SATA drives... with Windows SP2, it already knows how to talk to SATA controller without a floppy. RAID, is another matter. And I used external HD for backup.