Beginner MYCNCDIY Mill Build questions

[suraj1793]

Did some more searching and found this (http://www.mycncuk.com/threads/5790-...tor-and-drives), in this post JAZZCNC also highlighted the fact that 3.8mH is slightly high for motor inductance therefore, my first question has already been answered (unless the inductance rating depends on the application?).

Therefore, I started searching again for available kits/equipment for the electronics part of this build and heres what I found:
Stepper Motors: As per recommendations in Ivars211's thread (http://www.cnc4you.co.uk/index.php?r...product_id=362)

PSU: This was a bit confusing. In JAZCNC's post it was highlighted that for best performance you should run the motors at around 60-70VDC however, the kit on ebay shows 2pcs PSU 350W (36VDC/9.7A) and the 3 axis kits for running 3.1nm steppers on CNC4YOU.com showed 1pc 400W (36Volts) PSU. Are the kit PSU's just making use of large safety margins for the supply? If so, should I be looking for a PSU rated at 60-70V and 8-9A? Does anyone have any recommended suppliers? (Will be looking into building toroidal PSU if necessary)

Drivers: As per the ebay kit (http://www.ebay.co.uk/itm/3Axis-Step...item2eca734c31) However, I just noticed that these are rated at 50V and as per recommendations in the post they should be rated higher than the maximum applied voltage (which is recommended at 60-70V) therefore, are these the wrong drivers? If so, are there any suitable alternatives which are in the same price range? The AM882 were a bit out of my price range for this first build however, seem like a very good upgrade for the future.