The hydrolastic suspension could be made to work extremely well, I had a "wet" mini(69), and a Metro mk1 with hydrolastic, converted the rear to independant, as was linked across rear as std, made a bloody useful difference, and held the road well, despite 135/145 tyres!!
I must admit to being a BL fan, liked them all myself even though build quality could be shocking, if I could find a Marina 1.8 Super estate in BLue in good nick I wouldn't hesitate to buy it.
tabetha