Windows 7: Archos Questions

I am new to Archos players, and I have some questions, before buying one.
I want something with a bigger screen for a mp3/video player, than what my
ipod classic has (it's too small for watching movies on it).

Can either Archos 48 or 101 G9 play m2ts file type, if I buy cinema hd plugin?
Do I need a plugin to play FLAC file type on either of those two archos players?
Can they play about any file type with plugins? What about MKA or OGG on an Archos, can it play those?

Can it play a whole DVD Folder with menus, ripped by DVDFab, and video files converted to DVD Folder by Aimersoft video converter ultimate? (If I buy plugin?), on Archos 5? Does any Archos need album artwork on music albums, or does it not use it? What about album information, like album titles?

How much does plugins for audio/video cost?

If Archos doesn't support my windows 7, can I still use it? Or does it have to
support my operating system? I bought an ipod classic, and it don't support
windows 7, but I was able to use it. Can Archos 5 support most file types of both
audio and video, and work with windows 7, if I buy plugin? Thank you.