Tank-move/upgrade/cycling

Difficult decision you have there with the tanks.

I have had a much larger interpet tank and the experience I had was slightly mixed. The tank itself was fine. The hood was a slight problem because it has a hinged part at the front, which is fine for feeding and minor poop hoovering, but isn't quite big enough for getting your whole arm in for significant amounts of tank work. For cleaning the whole top had to be taken off, which shouldn't be too bad on a 65L tank, just be aware that there is a lot of condensation on the lid whick will drip. The filter was ok, I guess depending on what fish you have. Small fish that are a bit jumpy have been known to jump into the uncovered top of the filter. You can always place the filter higher and have more of a waterfall effect to avoid this problem.

I have several Fluval Romas, 125L and 200L, and also think they are great. You will find the lid on the Interpet Aquaverse totally infuriating in comparison to the Fluval Roma.

As for painting/covering a differnt cabinet, sometimes it takes a lot of preparation to deal with laminate cabinets. Real wood is so much easier, but more expensive. It might be worth having a look online to see if there is any specialist paint or other material that is designed to cover this sort of "wood".

Cabinets and tanks can be bought seperately, so would it be worth checking the measurements to see if the Fluval tank will fit on the grey  Interpet cabinet? Buying seperately will probably cost a little more, but it could be the best of both worlds.

There is another alternative - a custom built tank. Many come with cabinets in a wide range of colours and could be any size and shape you want. You mentioned a 60 x 40 footprint, and most 'off the shelf' tanks are 60 x 30 or maybe 35. With custom built you could have exactly 60 x 40.

My 180 litre was made to my specific measurements by ND Aquatics. They use inches, it's 42" wide x 18" deep x 18" tall (converts to 107 x 45 x 45 cm). Most 180 litre off the shelf tanks were taller with a smaller footprint and I wouldn't have been able to reach the bottom of the tank.
I just looked at their site, and ND Aq do a "metallika grey" finish........