Thinkpad E540 or S540

[lyubjmf]

Hello I'll be buying one of the models above but I can't decide which to buy. The main difference concerning me is the build. The S540 has a metal like case and perhaps a stronger hinge I think.
The confs are:
S540 - i7 4500U (2 cores, 1.8 - 3.0 GHz, 4 MB cache), no CD, AMD Radeon HD 8670M;
E540 - i7 4702MQ (4 cores, 2.2 -3.2 GHz, 6 MB cache), NVIDIA GeForce GT 740M;

Everything else seems the same to me.
I like better the S540 -better design, slimmer, longer battery life, fingerprint reader positioned at the right end below the keys.
On the other hand E540 has USB 2.0, CD, better CPU and better video card.
I don't know if the integrated video is the same.
The laptop is going to be used for Development (mostly WEB). Let's hope FHD display won't kill me . Won't be played games (to be exact games made in the last 10 years
I'm not sure if the slim will be powerful enough in the future. This will be a long term investment for at least 3-5 years. As long as it fits for the job and doesn't break.
The design and the build of the S540 wins me, but the more powerful CPU evens the score. (you know what they say about the condom. Better have and don't use than need it and not having it

Please give some advice. Thank you.

[RealBlackStuff]

Welcome to the forum.
If your main goal is web-design, then either one is already way too advanced beyond what you require!
Integrated graphics are plenty more than adequate!
You'll want a laptop with a 4:3 screen, that has plenty of height, so it will show more of your program!
All current widescreen laptops come with lousy 16:9 screens that have no useful height!
My advice: have a look at a T601 Frankenpad which is a 15" T60 with T61 motherboard and IPS UXGA (1600x1200).
Have a look here, I built this one (amongst many others): http://forum.thinkpads.com/viewtopic.php?f=21&t=108270

[lyubjmf]

At the moment WEB Development is what I do. I know they both are plenty more of what I need. It's just for me it will be a long term engagement . I do some OpenGL stuff but on the PC and rarely. I want the better built of the S540 combined with the power of the E540 at the average price (WOW this sounds like the perfect woman Perhaps I'll go for the better design and stronger build of the S540 and in the future(3-4 years) if it fails me I'll get a new one On the other hand minimized things has a better chance of failure.
P.S. I have Lenovo 3000 c200 XGA matrix ... no widescreen (they don't do of those good stuff anymore). Nice Frankenpad btw