Adrian, For your consideration have a read here: http://www.350z-uk.c..._cooler__st__20
I ended up with this oil cooler set up http://www.driftwork...vt-s14-s15.html
Its pretty cheap for the entire set up Hoses, fittings, Cooler and thermostatic sandwich plate and if can keep a drift car cool, its good enough for us!
Also it has a 92Deg C thermostatic sandwich plate which I couldn't find anywhere else. I think this is pretty important for a daily driver as it can take a while for your oil to get up to temp and a few others have told me in the winter they struggle to get above 60-70deg with a standard Thermostatic valve.
I would also, possibly have a re-think about the gauges. I appreciate you may not like the look of them but I am VERY glad I have mine, in particular the AFR and Oil Temp. I would say they are a necessity for longevity.
I have had a couple of issues over the last couple of years regarding fueling One of which was a faulty injector and the other a tuning issue during the open/closed loop transition.
The AFR gauge showed I was running dangerously lean from time to time and it allowed me to adjust my driving accordingly until the issues were identified and resolved. It was a god send while fault finding to. Without it I'm sure damage would have occurred.
Knowing your oil temp is up to temperature before you start to push it is very handy and probably just as important as it not running hot. Again, without my gauge I would have had no way of knowing that my oil Temp on track had reached 138DegC!!!! until it was too late. Thats how I knew I had to fit a cooler and how I monitor how effective the set up is.
If you don't want them on display, hide them in the cubby hole. I have one in there but you can easily fit 2 and maybe 3 in there if you wanted.
Just something for you to bare in mind.