Hi Andy,
I had another look at this recently when replacing my dogbone, with the dogbone removed the it made no difference to the spacing between sump and coolant hose - interesting you mention about the lower hose, maybe its a coolant change that is cause...
$525 wowsers, i expect the lower...
just noticed the headlights look in very good condition (normally go hazy). Plus on an 06 its one of the last MK2's (06 was crossover year between Mk2 and Mk3).
Welcome , cracking little cars the MK2 (like all clios ). As for wheels , 17s look a little big on the MK2 ,stick with 16s , turinis are a popular choice (as fitted to the 182 trophy and 172 cup)
No issues with my milltek, i would check the rear rubbers (one on each backbox). They may well be sagged / past their best and causing the exhasut to rattle on the rear beam - also check the heatshield is ok and secure.
You need the get the harnesses fitted 100% correct bud , not worth risking it. It's the angle in relation to the floor that's important too.
Looks like you are using the rear isofix for the passenger one ?
These ones http://pages.ebay.com/link/?nav=item.view&id=350976213901&alt=web
Fitment isn't the best , they look cheap off the car but passable when fitted. The milltek diameter is 51mm after the backboxes so the tips will need to fit this diameter.