Thanks,
Got it,loud and clear,PCI or PCIe even old PCI is still what I would like eventually,as they're still RTL champs,and lower cost than any locally available TB interface,though my W540 laptop only has TB1.
I mistakenly misread(so unusual for me!

) the manufacturer's description of it's 2014 inclusion of Thunderbolt,believing it was TB2 on this particularly configured model,as a refurb (not sure I'll go for a refurb again? definitely a lottery,as some can be fine),and an external PCIe card TB enclosure can be,with TB cables,plus a card,just way too OTT at present,but my NI KA6 works fine,except one XLR has the tip of a guitar cable stuck in it,so embarrassing.Hmm maybe I really should not write about myself at all! on the web....definitely it seems.
About onboard sound on this,I must say tough machine,as I've knocked it flying a couple of times semi recently unharmed,anyway I've completely uninstalled anything that tried to use the shockingly terrible on board speakers on this machine that really should've been specced with better as a 'workstation' laptop,as with this exact config. in mid 2015,where it was still listed as the current model on the aust. site at AU $3,550 or so

.
I got it including shipping for less than half that delivered from an ebay store in NYC,but it's been an adventuresome couple of years, would be one way of describing my experience with it from mid 2015, it is more powerful than my offline,neglected sandy bridge i7-2600k desktop I keep meaning to move from the garage/room,and start fresh,but this laptop's on board speakers...whoa,are so bad my mono cathode old cheapie mini TV( i still watch VHS tapes with when web tv is uh huh) actually seems high end.
I never wanted ever to hear them again (w540 speakers),which is a shame as my 2011 xps was really surprisingly good,that machine had a lot going for it,it just wasn't upgradable enough in the end,but it really was a gem,as it was 1/2 the price of the 2012 model.