£600 for software is alot of money for most people, unless you just happen to have it lying around I would caution against spending that amount for the complete package.
The complete suite contains alot of applications that from your description you would probably use infrequently if at all.
There are alot of free and/or cheap programs about that will do what you want but it will mean using a few different programs from different sources instead of having one 'packaged' suite and also trying a few to see which ones you get on with.
Also I do not think MX is very intuitive.
NVU is a free program that can handle CSS creation you could give it a go click here
There are plenty of others I am sure some of the kind people on this forum will share there experiences of them with you.