Hi i wonder which amp to buy, I play (hard)rock,punk and a little metal i just practice in my bedroom so i think il go with a 30w or 40w.

Should i take a Marshall 30W (i think it's from the mg) (230 Euro's)

Ashdown g40r 40 W (300 Euro's)

Or something else , Please help me out
First off, read some of the stickies at the top of this forum, especially the one about amps, effects etc.

Anyway, for your music styles I would suggest you look into a Roland Cube 30, they are great amps. Stay away from Marshall MG series, they sound horrid.