Scubaladdie

Hi guys, new here :) Happy New Year to everyone. Right, I live near Edinburgh but commute to the top of Scotland and back every week for work, a mix of A-roads / dual carriageways ( the A9 ) and tight twisty country roads. I previously had a 2004 VW Passat 1.9 TDI PD which did over 300k trouble free miles ( I bought it with 132k miles and never even had to change a clutch or anything ). Sadly the bodywork dissolved spectacularly. I then bought a 2007 VW Golf 2.0 TDI with 110k miles and FSH which has been the worst car I've ever owned. Now at 159k miles. New gearbox, 2x clutches !! , 2x sets rear shocks, countless electrical problems, uses more oil than fuel etc etc. Looking at getting a 2015 / 16 Octavia TDI and I really like the VRS. But a few questions: Are they reliable? I get my cars serviced meticulously as evidenced by the mileage my B5 Passat did. Also realistically what MPG should I expect? I've read 60+ but expect that to be very unlikely! My Passat seemed to average around 45mpg, the Golf around 47mpg although about 55mpg on a long motorway run. I'd be going for the 6-speed manual. Sorry for the long post :)