i would you sugest you find somthing with the newer gtx 1060 than to 960. it will be 140% better if my memory is correct. but zwift does not reqire it. i actuly think zwift is more tazing on the cpu than gpu baced on the reqirments
http://zwift.com/get-started
go to the bottom of the page and you can see to pc specs reqirments.
also alienware in my experiance tens to be a bit on the pricy side because it is a well known brand like apple.
a few notes on what you have posted
- i3-4170, w/4GB DDR3 @ 1600MHz and NVDIA GeForce GTX GPU 2G GDDR5 for $489
i see this a to old being it is using ddr3 and a cpu from the begining of 2015 and i see this a unfit, just to old. but it will work for basic graphics, this will not show you anying fancy
- i3 6100T, w/8BG DDR4 at 2133MHz and AMD Radeon R9 M470X GPU 2G GDDR5 for $588
an i3 is good ans it is skylake whitch as i am writing this it just turned to last a last gen cpu…but it is about a 10% difrence between to new and old. ddr4 memory has abace clock of 2133, the gpu was launched march of last year, and the 470 desktop card it a good one, i dont know about the laptop version. gddr5 is the standerd on the new gpus.
- i5 6400T w/8GB DDR4 at 2133Mhz and GeForce GTX960 GPU 4GB GDDR5 for $784
the i5 is a good cpu and it is skylake, but if you are only doing zwift and whant to best i would sugest a i7 seeing that it uses to cpu more. 8gb is fine, the 960 is a good match on the i5 for zwift seeing that is calles for a i7 with a 970. this is a balenced system.
it will be hard to find a gaming mini pc witha i7 because games usualy dont require more than a i5 because more prosesing power is put on the graphics card
the msi trident is a good small pc.
https://www.amazon.com/MSI-Trident-008US-Desktop-i5-6400-Windows/dp/B01M7RSC8U/ref=sr_1_1?s=pc&ie=UTF8&qid=1484115787&sr=1-1&keywords=msi+trident
this is the pc i have
https://www.amazon.com/MSI-GE72VR-Apache-Pro-024-i7-6700HQ/dp/B01IS33JNK/ref=sr_1_4?ie=UTF8&qid=1484113853&sr=8-4&keywords=msi+geforce+gtx+1060+laptop
that 1300 is a good price. and the smaller 15 in verion is cheeper right now.
i got my pc for 1250 before tax