There are loads of wheels which are 200/400 fitment. You've got a pick of some of Rovers finest wheels (bar the 17" Vitesse wheels which IMO are the sex).
I like the 16" Hairpins or 17" Straights, just type
MG Hairpins or
MG Straights into Google Images to see what I mean. You can pick up full sets of both from the bay of E for under £200.
Suspension, if you just want it lower, you can pick up some G-Max 40mm springs for about £100. Loads of people on Rovertech use them. If you want to improve the handling even further, you can get a complete set of springs and shocks for £200.
If you'll be using the car for mainly town driving and the odd hoon, standard shocks will be fine
![Smile :) :)](/styles/default/xenforo/vbSmilies/Normal/smile.gif)
I'm fitting shocks from a 220 Turbo to my car.
If you can wait a month or two, I'll have some 15" Turbo wheels (6 spokes) up for cheap.
To lower the car, you'll basically have to remove each strut from the car (break the ball-joint link with a hammer or ball-joint removal tool) and use spring compressors to compress the springs to the correct height.
I reckon a good garage could do it in a couple of hours, or find a friend in the know. Otherwise, get over to Rovertech (if you're not already there) and ask someone nearby for help.